fbpx
Wikipedia

Hypospadias

Hypospadias is a common variation in fetal development of the penis in which the urethra does not open from its usual location on the head of the penis. It is the second-most common birth defect of the male reproductive system, affecting about one of every 250 males at birth,[3] although when including milder cases, is found in up to 4% of newborn males.[4] Roughly 90% of cases are the less serious distal hypospadias, in which the urethral opening (the meatus) is on or near the head of the penis (glans). The remainder have proximal hypospadias, in which the meatus is all the way back on the shaft of the penis, near or within the scrotum. Shiny tissue that typically forms the urethra instead extends from the meatus to the tip of the glans; this tissue is called the urethral plate.

Hypospadias
Different types of hypospadias
Pronunciation
SpecialtyUrology, medical genetics

In most cases, the foreskin is less developed and does not wrap completely around the penis, leaving the underside of the glans uncovered. Also, a downward bending of the penis, commonly referred to as chordee, may occur.[5] Chordee is found in 10% of distal hypospadias[3] and 50% of proximal hypospadias[6] cases at the time of surgery. Also, the scrotum may be higher than usual on either side of the penis (called penoscrotal transposition).

The cause of hypospadias is unknown; scientists have investigated both genetic and environmental mechanisms, such as prenatal hormones.[7][8] Another model suggests hypospadias arises as a result of unerased epigenetic markers which canalize sexual development.[4] It most often occurs by itself, without other variations, although in about 10% of cases it may be part of disorder of sex development condition or a medical syndrome with multiple abnormalities.[9][10]

The most common associated difference is an undescended testicle, which has been reported in around 3% of infants with distal hypospadias and 10% with proximal hypospadias.[11] The combination of hypospadias and an undescended testicle sometimes indicates a child has a difference of sex development condition, so additional testing may be recommended to make sure the child does not have congenital adrenal hyperplasia with salt wasting or a similar condition where immediate medical intervention is needed.[12][13] Otherwise no blood tests or X-rays are routinely needed in newborns with hypospadias.[3]

Hypospadias can be a symptom or indication of a difference in sex development,[14] but some consider that the presence of hypospadias alone is not enough to classify someone as a person with a difference/variation in sex development or as intersex. In most cases, hypospadias is not associated with any other condition.[15] Hypospadias is sometimes considered as an intersex condition by several intersex rights activist groups, who consider the repositioning of a working urethra on a child too young to consent to be a human rights violation.[16][17][18]

Presentation edit

 
Genitalia showing major genital undermasculinization and hypospadias

A penis with hypospadias usually has a characteristic appearance. Not only is the meatus (urinary opening) lower than usual, but the foreskin is also often only partially developed, lacking the usual amount that would cover the glans on the underside, causing the glans to have a hooded appearance. However, newborns with partial foreskin development do not necessarily have hypospadias, as some have a meatus in the usual place with a hooded foreskin, called "chordee without hypospadias".[19]

In other cases, the foreskin (prepuce) is typical and the hypospadias is concealed. This is called "megameatus with intact prepuce". The condition is discovered during newborn circumcision or later in childhood when the foreskin begins to retract. A newborn with typical-appearing foreskin and a straight penis who is discovered to have hypospadias after the start of circumcision can have circumcision completed without concern for jeopardizing hypospadias repair.[20][21]

Complications edit

There is noted to be an increase in erectile problems in people with hypospadias, particularly when associated with a chordee (down curving of the shaft). There is usually minimal interaction with ability to ejaculate in hypospadias providing the meatus remains distal. This can also be affected by the coexistence of posterior urethral valves. There is an increase in difficulties associated with ejaculation, however, including increased rate of pain on ejaculation and weak/dribbling ejaculation. The rates of these problems are the same regardless of whether or not the hypospadias is surgically corrected.[22]

Cause edit

Genes and prenatal hormones edit

Hypospadias is present at birth, although the cause of hypospadias remains unknown. The influence of genes and the intrauterine environment have been proposed.[7] Sexual differentiation of males and female fetuses occurs under the influence of prenatal sex hormones. In humans, the development of external genitalia occurs in during an early hormone independent phase (5 to 8 weeks of gestation) and a later hormone dependent stage (weeks 8 to 12). One hypothesis proposes that atypical androgen exposure, or interference in the differentiation process, produces hypospadias.[8]

Epigenetic inheritance hypothesis edit

When one identical twin is born with hypospadias, his identical twin also has the trait only 25% of the time, despite sharing their genes and prenatal hormonal environment.[23] Animal studies have found that androgen antagonists during early fetal development cause elevated rates of hypospadias and cryptorchidism, however, in humans these traits rarely occur together.[23] In addition, levels of circulating testosterone overlap for both male and female fetuses throughout fetal development. Rice et al. have proposed that sexually dimorphic development occurs through epigenetic markers which are laid down during stem cell development, which blunt androgen signalling in XX fetuses, and boost sensitivity in XY fetuses.[4] If this marks are sexually antagonistic, and if a subset of these epigenetic marks carry over generations, they are expected to produce mosaicism of sexual development in opposite-sex offspring, sometimes producing hypospadias or cryptorchidism when passed from a mother to son (feminizing the external genitalia). Two small sample studies in 2012 and 2013 found changes in the transcriptome and methylome of hypospadias patients.[4] A 2022 study found additional evidence of atypical epigenetic methylation in foreskin tissue of hypospadias patients.[24] Rice's model requires further testing with currently available technology to support or falsify it.[4]

Treatment edit

Where hypospadias is seen as a genital ambiguity in a child, the World Health Organization standard of care is to delay surgery until the child is old enough to participate in informed consent, unless emergency surgery is needed because the child lacks a urinary opening. Hypospadias is not a serious medical condition. A urinary opening that is not surrounded by glans tissue is more likely to "spray" the urine, which can cause a person to sit to urinate because they cannot reliably stand and hit the toilet. Chordee is a separate condition, but where it occurs, the downward curvature of the penis may be enough to make sexual penetration more difficult. For these reasons or others, people with hypospadias may choose to seek urethroplasty, a surgical extension of the urethra using a skin graft. [citation needed]

Surgery can extend the urinary channel to the end of the penis, straighten bending, and/or change the foreskin (by either circumcision or by altering its appearance to look more typical ("preputioplasty"), depending on the desire of the patient. Urethroplasty failure rates vary enormously, from around 5% for the simplest repairs to damage in a normal urethra by an experienced surgeon, to 15-20% when a buccal graft from the inside of the mouth can be used to extend a urethra, to close to 50% when graft urethral tubes are constructed from other skin.[25]

When the hypospadias is extensive–third degree/penoscrotal–or has associated differences in sex development such as chordee or cryptorchidism, the best management can be a more complicated decision. The world standard (UN and WHO) forbids nonessential surgery to produce a "normal" appearance without the informed consent of the patient,[26] and the American Academy of Pediatrics currently recommends but does not require the same standard. The AAP Textbook of Pediatric Care states "Gender assignment in patients with genital ambiguity should be made only after careful investigation by a multidisciplinary team; increasingly, surgical decisions are delayed until the child is able to participate in the decision-making process."[27] A karyotype and endocrine evaluation should be performed to detect intersex conditions or hormone deficiencies that have major health risks (i.e. salt-wasting). If the penis is small, testosterone or human chorionic gonadotropin (hCG) injections may be given with consent to enlarge it before surgery if this will increase the chance of a successful urethral repair.[3]

Surgical repair of severe hypospadias may require multiple procedures and mucosal grafting. Preputial skin is often used for grafting and circumcision should be avoided before repair. In patients with severe hypospadias, surgery often produces unsatisfactory results, such as scarring, curvature, or formation of urethral fistulas, diverticula, or strictures. A fistula is an unwanted opening through the skin along the course of the urethra, and can result in urinary leakage or an abnormal stream. A diverticulum is an "outpocketing" of the lining of the urethra which interferes with urinary flow and may result in posturination leakage. A stricture is a narrowing of the urethra severe enough to obstruct flow. Reduced complication rates even for third-degree repair (e.g., fistula rates below 5%) have been reported in recent years from centers with the most experience.[28] However, typical complications in urethroplasty for severe hypospadias can lead to long surgical cycles of failure and repair, and side effects may include loss of sexual or urinary function.[29] Research suggests failure rates are higher when urethroplasty corrects a born condition rather than disease or injury[30] so patients and families considering surgery for hypospadias should have realistic expectations about the risks and benefits.[31]

Age at surgery edit

The results of surgery are probably not influenced by the age at which repair is done.[32][33] Teens and adults typically spend one night in the hospital after surgery.[citation needed]

Preoperative hormones edit

Hormones potentially increase the size of the penis, and have been used in children with proximal hypospadias who have a smaller penis. Numerous articles report testosterone injections or topical creams increase the length and circumference of the penis. However, few studies discuss the impact of this treatment on the success of corrective surgery, with conflicting results.[33][34]

Surgery edit

Surgery is not always required for minor hypospadias like glanular hypospadias and coronal hypospadias if the meatus is of good caliber, urine flow is in good stream & forwardly directed.[35]

Hypospadias repair is done under general anesthesia, most often supplemented by a nerve block to the penis or a caudal block to reduce the general anesthesia needed, and to minimize discomfort after surgery.[citation needed]

Many techniques have been used during the past 100 years to extend the urinary channel to the desired location. Today, the most common operation, known as the tubularized incised plate or "TIP" repair, rolls the urethral plate from the low meatus to the end of the glans. TIP repair, also called the Snodgrass Repair (after the creator of the method, Dr. Warren Snodgrass), is the most widely used procedure and surgical method for hypospadias repair worldwide. This procedure can be used for all distal hypospadias repairs, with complications afterwards expected in less than 10% of cases.[36][37]

Less consensus exists regarding proximal hypospadias repair.[38] TIP repair can be used when the penis is straight or has mild downward curvature, with success in 85%.[36] Alternatively, the urinary channel can be reconstructed using the foreskin, with reported success in from 55% to 75%.[39]

Most distal and many proximal hypospadias are corrected in a single operation. However, those with the most severe condition having a urinary opening in the scrotum and downward bending of the penis are often corrected in a two-stage operation. During the first operation the curvature is straightened. At the second, the urinary channel is completed. Any complications may require additional interventions for repair.[citation needed]

Outcomes edit

Problems that can arise include a small hole in the urinary channel below the meatus, called a fistula. The head of the penis, which is open at birth in children with hypospadias and is closed around the urinary channel at surgery, sometimes reopens, known as glans dehiscence. The new urinary opening can scar, resulting in meatal stenosis, or internal scarring can create a stricture, either of which cause partial blockage to urinating. If the new urinary channel balloons when urinating a child is diagnosed with a diverticulum.[citation needed]

Most complications are discovered within six months after surgery, although they occasionally are not found for many years. In general, when no problems are apparent after repair in childhood, new complications arising after puberty are uncommon. However, some problems that were not adequately repaired in childhood may become more pronounced when the penis grows at puberty, such as residual penile curvature or urine spraying due to rupture of the repair at the head of the penis.[citation needed]

Complications are usually corrected with another operation, most often delayed for at least six months after the last surgery to allow the tissues to heal sufficiently before attempting another repair. Results when circumcision or foreskin reconstruction are done are the same.[40][41] (Figure 4a, 4b)

Patients and surgeons had differing opinions as to outcomes of hypospadias repair, that is, patients might not be satisfied with a cosmetic result considered satisfactory by the surgeon, but patients with a cosmetic result considered not very satisfactory by the surgeon may themselves be satisfied. Overall, patients were less satisfied than surgeons.[22]

Living with hypospadias can present challenging emotional obstacles. Many men, whether they have had surgical repair of their hypospadias as a child or not often are very guarded in school bathrooms or locker rooms. Secrecy about the condition can complicate emotional pain, because talking about the penis is often a taboo subject. Worry, anxiety and feelings of shame are common among adult men born with hypospadias.[42]

Epidemiology edit

Hypospadias is among the most common birth defects in the world and is said to be the second-most common birth defect in the male reproductive system, occurring once in every 250 males.[43] When including milder cases, it is seen in as many as 4% of newborn male babies.[4]

Due to variations in the reporting requirements of different national databases, data from such registries cannot be used to accurately determine either incidence of hypospadias or geographical variations in its occurrences.[3]

Adults edit

While most hypospadias repairs are done in childhood, occasionally, an adult desires surgery because of urinary spraying or unhappiness with the appearance.

A direct comparison of surgical results in children versus adults found they had the same outcomes, and adults can undergo hypospadias repair or reoperations with good expectations for success.[33]

Society and culture edit

Notable individuals with hypospadias: (sources and citation needed)

See also edit

References edit

  1. ^ Entry "hypospadias" in Merriam-Webster Online Dictionary.
  2. ^ OED 2nd edition, 1989 as /hɪpəʊˈspeɪdɪəs/~/haɪpəʊˈspeɪdɪəs/
  3. ^ a b c d e Snodgrass W (2012). "Chapter 130: Hypospadias". In Wein A, Campbell MF, Walsh PC (eds.). Campbell-Walsh Urology, Tenth Edition. Elsevier. pp. 3503–3536. ISBN 978-1-4160-6911-9.
  4. ^ a b c d e f Rice, William R.; Friberg, Urban; Gavrilets, Sergey (2016). "Sexually antagonistic epigenetic marks that canalize sexually dimorphic development" (PDF). Molecular Ecology. 25 (8): 1812–1822. doi:10.1111/mec.13490. ISSN 0962-1083.
  5. ^ King S, Beasley S (2012) [1st. Pub. 1986]. "Chapter 9.1:Surgical Conditions in Older Children". In South M (ed.). Practical Paediatrics, Seventh Edition. Churchill Livingstone, Elsevier. pp. 266–267. ISBN 978-0-702-04292-8.
  6. ^ Snodgrass W, Prieto J (October 2009). "Straightening ventral curvature while preserving the urethral plate in proximal hypospadias repair". The Journal of Urology. 182 (4 Suppl): 1720–5. doi:10.1016/j.juro.2009.02.084. PMID 19692004.
  7. ^ a b "Hypospadias - Symptoms and causes". Mayo Clinic. Retrieved 2023-12-13.
  8. ^ a b Bouty, Aurore; Ayers, Katie L.; Pask, Andrew; Heloury, Yves; Sinclair, Andrew H. (2015-11-28). "The Genetic and Environmental Factors Underlying Hypospadias". Sexual Development. 9 (5): 239–259. doi:10.1159/000441988. ISSN 1661-5425. PMC 5012964.
  9. ^ Stoll C, Alembik Y, Roth MP, Dott B (September 1990). "Genetic and environmental factors in hypospadias". Journal of Medical Genetics. 27 (9): 559–63. doi:10.1136/jmg.27.9.559. PMC 1017217. PMID 2231648.
  10. ^ Calzolari E, Contiero MR, Roncarati E, Mattiuz PL, Volpato S (August 1986). "Aetiological factors in hypospadias". Journal of Medical Genetics. 23 (4): 333–7. doi:10.1136/jmg.23.4.333. PMC 1049700. PMID 3746833.
  11. ^ Wu H, Wei Z, M G (2002). "Hypospadias and enlarged prostatic utricle". Chinese Journal of Urology. 12: 51–3.
  12. ^ Kaefer M, Tobin MS, Hendren WH, Bauer SB, Peters CA, Atala A, et al. (April 1997). "Continent urinary diversion: the Children's Hospital experience". The Journal of Urology. 157 (4): 1394–9. doi:10.1016/S0022-5347(01)64998-X. PMID 9120962.
  13. ^ Tarman GJ, Kaplan GW, Lerman SL, McAleer IM, Losasso BE (January 2002). "Lower genitourinary injury and pelvic fractures in pediatric patients". Urology. 59 (1): 123–6, discussion 126. doi:10.1016/S0090-4295(01)01526-6. PMID 11796295.
  14. ^ "Explaining Disorders of Sex Development & Intersexuality".
  15. ^ Tidy, Colin (January 19, 2016). "Hypospadias". Patient. Patient Platform Ltd. Retrieved October 18, 2018.
  16. ^ "What is intersex? Frequently Asked Questions and Intersex Definitions". interACT. Retrieved May 7, 2021.
  17. ^ "Alice Dreger: Do you have to pee standing up to be a real man? – Intersex Human Rights Australia". ihra.org.au. 2014-02-14. Retrieved 2022-03-22.
  18. ^ "IGM". OII Europe. 2021-02-04. Retrieved 2022-03-22.
  19. ^ Singh S, Rawat J, Kureel SN, Pandey A. Chordee without hypospadias: Operative classification and its management. Urol Ann. 2013 Apr;5(2):93-8. doi:10.4103/0974-7796.110005. PMID 23798865; PMCID: PMC3685753.
  20. ^ Snodgrass WT, Khavari R (July 2006). "Prior circumcision does not complicate repair of hypospadias with an intact prepuce". The Journal of Urology. 176 (1): 296–8. doi:10.1016/S0022-5347(06)00564-7. PMID 16753427.
  21. ^ Chalmers D, Wiedel CA, Siparsky GL, Campbell JB, Wilcox DT (May 2014). "Discovery of hypospadias during newborn circumcision should not preclude completion of the procedure". The Journal of Pediatrics. 164 (5): 1171–1174.e1. doi:10.1016/j.jpeds.2014.01.013. PMID 24534572.
  22. ^ a b Mieusset R, Soulié M (2005). "Hypospadias: psychosocial, sexual, and reproductive consequences in adult life". Journal of Andrology. 26 (2): 163–8. doi:10.1002/j.1939-4640.2005.tb01078.x. PMID 15713818.
  23. ^ a b Rice, William R.; Friberg, Urban; Gavrilets, Sergey (2012). "Homosexuality as a Consequence of Epigenetically Canalized Sexual Development" (PDF). The Quarterly Review of Biology. 87 (4): 355–356. doi:10.1086/668167. ISSN 0033-5770.
  24. ^ Kaefer, Martin; Rink, Richard; Misseri, Rosalia; Winchester, Paul; Proctor, Cathy; Ben Maamar, Millissia; Beck, Daniel; Nilsson, Eric; Skinner, Michael K. (2023-01-11). "Role of epigenetics in the etiology of hypospadias through penile foreskin DNA methylation alterations". Scientific Reports. 13 (1): 555. doi:10.1038/s41598-023-27763-5. ISSN 2045-2322. PMC 9834259.
  25. ^ "Urethroplasty". Department of Urology. 2016-06-06. Retrieved 2019-06-14.
  26. ^ "United Nations Fact Sheet-Intersex" (PDF).
  27. ^ Loomba-Albrecht, Lindsey A.; Styne, Dennis M. (2017). "Disorders of Sex Development". American Academy of Pediatrics Textbook of Pediatric Care (2nd ed.). ISBN 978-1-61002-579-9.
  28. ^ "Re operation with Dr Nicol Bush & Dr Warren Snodgrass". PARC Urology Hypospadias Center. 2016-07-15. Retrieved 2019-05-09.
  29. ^ Bayne, Aaron P.; Jones, Eric A. (2010). "Complications of hypospadias repair". In Taneja, Samir S. (ed.). Complications of Urologic Surgery (4th ed.). W.B. Saunders. pp. 713–722. ISBN 978-1-4160-4572-4.
  30. ^ Suh JG, Choi WS, Paick JS, Kim SW (July 2013). "Surgical Outcome of Excision and End-to-End Anastomosis for Bulbar Urethral Stricture". Korean Journal of Urology. 54 (7): 442–7. doi:10.4111/kju.2013.54.7.442. PMC 3715707. PMID 23878686.
  31. ^ "What are some of the risks of penile surgery?". ISSM. 2012-02-21. Retrieved 2019-06-14.
  32. ^ Warren T. Snodgrass (2013-05-13). Pediatric Urology: Evidence for Optimal Patient Management. Springer Science & Business Media. pp. 117–. ISBN 978-1-4614-6910-0.
  33. ^ a b c Bush N, Snodgrass W (August 2014). "Response to "Re: Snodgrass W, et al. Duration of follow-up to diagnose hypospadias urethroplasty complications. J Pediatr Urol 2014;10:783-784"". Journal of Pediatric Urology. 10 (4): 784–5. doi:10.1016/j.jpurol.2014.04.022. PMID 24999242.
  34. ^ Kaplan GW (September 2008). "Does administration of transdermal dihydrotestosterone gel before hypospadias repair improve postoperative outcomes?". Nature Clinical Practice. Urology. 5 (9): 474–5. doi:10.1038/ncpuro1178. PMID 18679395. S2CID 22512786.
  35. ^ "Hypospadias". Retrieved 2023-03-21.
  36. ^ a b Snodgrass WT, Bush N, Cost N (August 2010). "Tubularized incised plate hypospadias repair for distal hypospadias". Journal of Pediatric Urology. 6 (4): 408–13. doi:10.1016/j.jpurol.2009.09.010. PMID 19837000.
  37. ^ Wilkinson DJ, Farrelly P, Kenny SE (June 2012). "Outcomes in distal hypospadias: a systematic review of the Mathieu and tubularized incised plate repairs". Journal of Pediatric Urology. 8 (3): 307–12. doi:10.1016/j.jpurol.2010.11.008. PMID 21159560.
  38. ^ Castagnetti M, El-Ghoneimi A (October 2010). "Surgical management of primary severe hypospadias in children: systematic 20-year review". The Journal of Urology. 184 (4): 1469–74. doi:10.1016/j.juro.2010.06.044. PMID 20727541.
  39. ^ Warren T. Snodgrass (2013-05-13). Pediatric Urology: Evidence for Optimal Patient Management. Springer Science & Business Media. pp. 129–. ISBN 978-1-4614-6910-0.
  40. ^ Suoub M, Dave S, El-Hout Y, Braga LH, Farhat WA (October 2008). "Distal hypospadias repair with or without foreskin reconstruction: A single-surgeon experience". Journal of Pediatric Urology. 4 (5): 377–80. doi:10.1016/j.jpurol.2008.01.215. PMID 18790424.
  41. ^ Snodgrass W, Dajusta D, Villanueva C, Bush N (August 2013). "Foreskin reconstruction does not increase urethroplasty or skin complications after distal TIP hypospadias repair". Journal of Pediatric Urology. 9 (4): 401–6. doi:10.1016/j.jpurol.2012.06.008. PMID 22854388.
  42. ^ Filippelli, John (2021). Living With Hypospadias. Palmetto Publishing. pp. 24–30. ISBN 978-1638372172.
  43. ^ Gatti JM. "Epidemiology". Medscape Reference. Retrieved 22 January 2013.
  44. ^ "The "infertility" of Catherine de Medici and its influence on 16th century France" (PDF).
  45. ^ "Male or female? Babies born on the sliding sex scale". British Broadcasting Corporation. 11 October 2011. Retrieved 2016-05-12.
  46. ^ Littlefield, Amy (August 13, 2018). "Intersex People Want to End Nonconsensual Surgeries. A California Resolution Is Their 'Warning Shot.'". Rewire.News. Retrieved 2018-11-30.
  47. ^ Intersexualidad: «Nunca me sentí niña y mi comportamiento masculino era un problema». ABC. 20 October 2014.
  48. ^ La barba me dio la razón: aunque me criaran como una niña, yo era un niño. El País. 30 June 2016.
  49. ^ Lieberman, Hallie (August 29, 2018). "The Trigger Effect". The Atavist Magazine. No. 82. from the original on September 1, 2018. Retrieved 2018-08-31.
  50. ^ Heifetz, Danny, When a Dick Joke Isn't a Joke, theringer.com, March 2020

Further reading edit

  • Austin PF, Siow Y, Fallat ME, Cain MP, Rink RC, Casale AJ (October 2002). "The relationship between müllerian inhibiting substance and androgens in boys with hypospadias". The Journal of Urology. 168 (4 Pt 2): 1784–8, discussion 1788. doi:10.1016/S0022-5347(05)64413-8. PMID 12352359.
  • Patel RP, Shukla AR, Snyder HM (October 2004). "The island tube and island onlay hypospadias repairs offer excellent long-term outcomes: a 14-year followup". The Journal of Urology. 172 (4 Pt 2): 1717–9, discussion 1719. doi:10.1097/01.ju.0000138903.20136.22. PMID 15371798.
  • Retik AB, Atala A (May 2002). "Complications of hypospadias repair". The Urologic Clinics of North America. 29 (2): 329–39. doi:10.1016/S0094-0143(02)00026-5. PMID 12371224.
  • Shukla AR, Patel RP, Canning DA (August 2004). "Hypospadias". The Urologic Clinics of North America. 31 (3): 445–60, viii. doi:10.1016/j.ucl.2004.04.020. PMID 15313054.
  • "Special issue on hypospadias". Indian Journal of Urology. 24 (2). 2008.

External links edit

hypospadias, common, variation, fetal, development, penis, which, urethra, does, open, from, usual, location, head, penis, second, most, common, birth, defect, male, reproductive, system, affecting, about, every, males, birth, although, when, including, milder. Hypospadias is a common variation in fetal development of the penis in which the urethra does not open from its usual location on the head of the penis It is the second most common birth defect of the male reproductive system affecting about one of every 250 males at birth 3 although when including milder cases is found in up to 4 of newborn males 4 Roughly 90 of cases are the less serious distal hypospadias in which the urethral opening the meatus is on or near the head of the penis glans The remainder have proximal hypospadias in which the meatus is all the way back on the shaft of the penis near or within the scrotum Shiny tissue that typically forms the urethra instead extends from the meatus to the tip of the glans this tissue is called the urethral plate HypospadiasDifferent types of hypospadiasPronunciation h aɪ p oʊ ˈ s p eɪ d i e s 1 2 SpecialtyUrology medical genetics In most cases the foreskin is less developed and does not wrap completely around the penis leaving the underside of the glans uncovered Also a downward bending of the penis commonly referred to as chordee may occur 5 Chordee is found in 10 of distal hypospadias 3 and 50 of proximal hypospadias 6 cases at the time of surgery Also the scrotum may be higher than usual on either side of the penis called penoscrotal transposition The cause of hypospadias is unknown scientists have investigated both genetic and environmental mechanisms such as prenatal hormones 7 8 Another model suggests hypospadias arises as a result of unerased epigenetic markers which canalize sexual development 4 It most often occurs by itself without other variations although in about 10 of cases it may be part of disorder of sex development condition or a medical syndrome with multiple abnormalities 9 10 The most common associated difference is an undescended testicle which has been reported in around 3 of infants with distal hypospadias and 10 with proximal hypospadias 11 The combination of hypospadias and an undescended testicle sometimes indicates a child has a difference of sex development condition so additional testing may be recommended to make sure the child does not have congenital adrenal hyperplasia with salt wasting or a similar condition where immediate medical intervention is needed 12 13 Otherwise no blood tests or X rays are routinely needed in newborns with hypospadias 3 Hypospadias can be a symptom or indication of a difference in sex development 14 but some consider that the presence of hypospadias alone is not enough to classify someone as a person with a difference variation in sex development or as intersex In most cases hypospadias is not associated with any other condition 15 Hypospadias is sometimes considered as an intersex condition by several intersex rights activist groups who consider the repositioning of a working urethra on a child too young to consent to be a human rights violation 16 17 18 Contents 1 Presentation 1 1 Complications 2 Cause 2 1 Genes and prenatal hormones 2 2 Epigenetic inheritance hypothesis 3 Treatment 3 1 Age at surgery 3 2 Preoperative hormones 3 3 Surgery 4 Outcomes 5 Epidemiology 6 Adults 7 Society and culture 8 See also 9 References 10 Further reading 11 External linksPresentation edit nbsp Genitalia showing major genital undermasculinization and hypospadias A penis with hypospadias usually has a characteristic appearance Not only is the meatus urinary opening lower than usual but the foreskin is also often only partially developed lacking the usual amount that would cover the glans on the underside causing the glans to have a hooded appearance However newborns with partial foreskin development do not necessarily have hypospadias as some have a meatus in the usual place with a hooded foreskin called chordee without hypospadias 19 In other cases the foreskin prepuce is typical and the hypospadias is concealed This is called megameatus with intact prepuce The condition is discovered during newborn circumcision or later in childhood when the foreskin begins to retract A newborn with typical appearing foreskin and a straight penis who is discovered to have hypospadias after the start of circumcision can have circumcision completed without concern for jeopardizing hypospadias repair 20 21 Complications edit There is noted to be an increase in erectile problems in people with hypospadias particularly when associated with a chordee down curving of the shaft There is usually minimal interaction with ability to ejaculate in hypospadias providing the meatus remains distal This can also be affected by the coexistence of posterior urethral valves There is an increase in difficulties associated with ejaculation however including increased rate of pain on ejaculation and weak dribbling ejaculation The rates of these problems are the same regardless of whether or not the hypospadias is surgically corrected 22 Cause editGenes and prenatal hormones edit Hypospadias is present at birth although the cause of hypospadias remains unknown The influence of genes and the intrauterine environment have been proposed 7 Sexual differentiation of males and female fetuses occurs under the influence of prenatal sex hormones In humans the development of external genitalia occurs in during an early hormone independent phase 5 to 8 weeks of gestation and a later hormone dependent stage weeks 8 to 12 One hypothesis proposes that atypical androgen exposure or interference in the differentiation process produces hypospadias 8 Epigenetic inheritance hypothesis edit When one identical twin is born with hypospadias his identical twin also has the trait only 25 of the time despite sharing their genes and prenatal hormonal environment 23 Animal studies have found that androgen antagonists during early fetal development cause elevated rates of hypospadias and cryptorchidism however in humans these traits rarely occur together 23 In addition levels of circulating testosterone overlap for both male and female fetuses throughout fetal development Rice et al have proposed that sexually dimorphic development occurs through epigenetic markers which are laid down during stem cell development which blunt androgen signalling in XX fetuses and boost sensitivity in XY fetuses 4 If this marks are sexually antagonistic and if a subset of these epigenetic marks carry over generations they are expected to produce mosaicism of sexual development in opposite sex offspring sometimes producing hypospadias or cryptorchidism when passed from a mother to son feminizing the external genitalia Two small sample studies in 2012 and 2013 found changes in the transcriptome and methylome of hypospadias patients 4 A 2022 study found additional evidence of atypical epigenetic methylation in foreskin tissue of hypospadias patients 24 Rice s model requires further testing with currently available technology to support or falsify it 4 Treatment editWhere hypospadias is seen as a genital ambiguity in a child the World Health Organization standard of care is to delay surgery until the child is old enough to participate in informed consent unless emergency surgery is needed because the child lacks a urinary opening Hypospadias is not a serious medical condition A urinary opening that is not surrounded by glans tissue is more likely to spray the urine which can cause a person to sit to urinate because they cannot reliably stand and hit the toilet Chordee is a separate condition but where it occurs the downward curvature of the penis may be enough to make sexual penetration more difficult For these reasons or others people with hypospadias may choose to seek urethroplasty a surgical extension of the urethra using a skin graft citation needed Surgery can extend the urinary channel to the end of the penis straighten bending and or change the foreskin by either circumcision or by altering its appearance to look more typical preputioplasty depending on the desire of the patient Urethroplasty failure rates vary enormously from around 5 for the simplest repairs to damage in a normal urethra by an experienced surgeon to 15 20 when a buccal graft from the inside of the mouth can be used to extend a urethra to close to 50 when graft urethral tubes are constructed from other skin 25 When the hypospadias is extensive third degree penoscrotal or has associated differences in sex development such as chordee or cryptorchidism the best management can be a more complicated decision The world standard UN and WHO forbids nonessential surgery to produce a normal appearance without the informed consent of the patient 26 and the American Academy of Pediatrics currently recommends but does not require the same standard The AAP Textbook of Pediatric Care states Gender assignment in patients with genital ambiguity should be made only after careful investigation by a multidisciplinary team increasingly surgical decisions are delayed until the child is able to participate in the decision making process 27 A karyotype and endocrine evaluation should be performed to detect intersex conditions or hormone deficiencies that have major health risks i e salt wasting If the penis is small testosterone or human chorionic gonadotropin hCG injections may be given with consent to enlarge it before surgery if this will increase the chance of a successful urethral repair 3 Surgical repair of severe hypospadias may require multiple procedures and mucosal grafting Preputial skin is often used for grafting and circumcision should be avoided before repair In patients with severe hypospadias surgery often produces unsatisfactory results such as scarring curvature or formation of urethral fistulas diverticula or strictures A fistula is an unwanted opening through the skin along the course of the urethra and can result in urinary leakage or an abnormal stream A diverticulum is an outpocketing of the lining of the urethra which interferes with urinary flow and may result in posturination leakage A stricture is a narrowing of the urethra severe enough to obstruct flow Reduced complication rates even for third degree repair e g fistula rates below 5 have been reported in recent years from centers with the most experience 28 However typical complications in urethroplasty for severe hypospadias can lead to long surgical cycles of failure and repair and side effects may include loss of sexual or urinary function 29 Research suggests failure rates are higher when urethroplasty corrects a born condition rather than disease or injury 30 so patients and families considering surgery for hypospadias should have realistic expectations about the risks and benefits 31 Age at surgery edit The results of surgery are probably not influenced by the age at which repair is done 32 33 Teens and adults typically spend one night in the hospital after surgery citation needed Preoperative hormones edit Hormones potentially increase the size of the penis and have been used in children with proximal hypospadias who have a smaller penis Numerous articles report testosterone injections or topical creams increase the length and circumference of the penis However few studies discuss the impact of this treatment on the success of corrective surgery with conflicting results 33 34 Surgery edit Surgery is not always required for minor hypospadias like glanular hypospadias and coronal hypospadias if the meatus is of good caliber urine flow is in good stream amp forwardly directed 35 Hypospadias repair is done under general anesthesia most often supplemented by a nerve block to the penis or a caudal block to reduce the general anesthesia needed and to minimize discomfort after surgery citation needed Many techniques have been used during the past 100 years to extend the urinary channel to the desired location Today the most common operation known as the tubularized incised plate or TIP repair rolls the urethral plate from the low meatus to the end of the glans TIP repair also called the Snodgrass Repair after the creator of the method Dr Warren Snodgrass is the most widely used procedure and surgical method for hypospadias repair worldwide This procedure can be used for all distal hypospadias repairs with complications afterwards expected in less than 10 of cases 36 37 Less consensus exists regarding proximal hypospadias repair 38 TIP repair can be used when the penis is straight or has mild downward curvature with success in 85 36 Alternatively the urinary channel can be reconstructed using the foreskin with reported success in from 55 to 75 39 Most distal and many proximal hypospadias are corrected in a single operation However those with the most severe condition having a urinary opening in the scrotum and downward bending of the penis are often corrected in a two stage operation During the first operation the curvature is straightened At the second the urinary channel is completed Any complications may require additional interventions for repair citation needed nbsp Example of penis with hypospadias nbsp Penis with hypospadias 1 and two fistulae 2 nbsp Adult penis with hypospadias nbsp Adult penis with hypospadiasOutcomes editProblems that can arise include a small hole in the urinary channel below the meatus called a fistula The head of the penis which is open at birth in children with hypospadias and is closed around the urinary channel at surgery sometimes reopens known as glans dehiscence The new urinary opening can scar resulting in meatal stenosis or internal scarring can create a stricture either of which cause partial blockage to urinating If the new urinary channel balloons when urinating a child is diagnosed with a diverticulum citation needed Most complications are discovered within six months after surgery although they occasionally are not found for many years In general when no problems are apparent after repair in childhood new complications arising after puberty are uncommon However some problems that were not adequately repaired in childhood may become more pronounced when the penis grows at puberty such as residual penile curvature or urine spraying due to rupture of the repair at the head of the penis citation needed Complications are usually corrected with another operation most often delayed for at least six months after the last surgery to allow the tissues to heal sufficiently before attempting another repair Results when circumcision or foreskin reconstruction are done are the same 40 41 Figure 4a 4b Patients and surgeons had differing opinions as to outcomes of hypospadias repair that is patients might not be satisfied with a cosmetic result considered satisfactory by the surgeon but patients with a cosmetic result considered not very satisfactory by the surgeon may themselves be satisfied Overall patients were less satisfied than surgeons 22 Living with hypospadias can present challenging emotional obstacles Many men whether they have had surgical repair of their hypospadias as a child or not often are very guarded in school bathrooms or locker rooms Secrecy about the condition can complicate emotional pain because talking about the penis is often a taboo subject Worry anxiety and feelings of shame are common among adult men born with hypospadias 42 Epidemiology editHypospadias is among the most common birth defects in the world and is said to be the second most common birth defect in the male reproductive system occurring once in every 250 males 43 When including milder cases it is seen in as many as 4 of newborn male babies 4 Due to variations in the reporting requirements of different national databases data from such registries cannot be used to accurately determine either incidence of hypospadias or geographical variations in its occurrences 3 Adults editWhile most hypospadias repairs are done in childhood occasionally an adult desires surgery because of urinary spraying or unhappiness with the appearance A direct comparison of surgical results in children versus adults found they had the same outcomes and adults can undergo hypospadias repair or reoperations with good expectations for success 33 Society and culture editNotable individuals with hypospadias sources and citation needed Henry II of France 44 Tiger Devore 45 46 Gabriel J Martin 47 48 Scout Schultz 49 Maurice Duplessis citation needed Aprilio Manganang citation needed Lil Dicky 50 See also editPediatric urology Andrology Bladder exstrophy cloacal exstrophy Perineal urethra pseudovaginal perineoscrotal hypospadias Intersex surgery Androgen insensitivity syndrome Testicular dysgenesis syndromeReferences edit Entry hypospadias in Merriam Webster Online Dictionary OED 2nd edition 1989 as hɪpeʊˈspeɪdɪes haɪpeʊˈspeɪdɪes a b c d e Snodgrass W 2012 Chapter 130 Hypospadias In Wein A Campbell MF Walsh PC eds Campbell Walsh Urology Tenth Edition Elsevier pp 3503 3536 ISBN 978 1 4160 6911 9 a b c d e f Rice William R Friberg Urban Gavrilets Sergey 2016 Sexually antagonistic epigenetic marks that canalize sexually dimorphic development PDF Molecular Ecology 25 8 1812 1822 doi 10 1111 mec 13490 ISSN 0962 1083 King S Beasley S 2012 1st Pub 1986 Chapter 9 1 Surgical Conditions in Older Children In South M ed Practical Paediatrics Seventh Edition Churchill Livingstone Elsevier pp 266 267 ISBN 978 0 702 04292 8 Snodgrass W Prieto J October 2009 Straightening ventral curvature while preserving the urethral plate in proximal hypospadias repair The Journal of Urology 182 4 Suppl 1720 5 doi 10 1016 j juro 2009 02 084 PMID 19692004 a b Hypospadias Symptoms and causes Mayo Clinic Retrieved 2023 12 13 a b Bouty Aurore Ayers Katie L Pask Andrew Heloury Yves Sinclair Andrew H 2015 11 28 The Genetic and Environmental Factors Underlying Hypospadias Sexual Development 9 5 239 259 doi 10 1159 000441988 ISSN 1661 5425 PMC 5012964 Stoll C Alembik Y Roth MP Dott B September 1990 Genetic and environmental factors in hypospadias Journal of Medical Genetics 27 9 559 63 doi 10 1136 jmg 27 9 559 PMC 1017217 PMID 2231648 Calzolari E Contiero MR Roncarati E Mattiuz PL Volpato S August 1986 Aetiological factors in hypospadias Journal of Medical Genetics 23 4 333 7 doi 10 1136 jmg 23 4 333 PMC 1049700 PMID 3746833 Wu H Wei Z M G 2002 Hypospadias and enlarged prostatic utricle Chinese Journal of Urology 12 51 3 Kaefer M Tobin MS Hendren WH Bauer SB Peters CA Atala A et al April 1997 Continent urinary diversion the Children s Hospital experience The Journal of Urology 157 4 1394 9 doi 10 1016 S0022 5347 01 64998 X PMID 9120962 Tarman GJ Kaplan GW Lerman SL McAleer IM Losasso BE January 2002 Lower genitourinary injury and pelvic fractures in pediatric patients Urology 59 1 123 6 discussion 126 doi 10 1016 S0090 4295 01 01526 6 PMID 11796295 Explaining Disorders of Sex Development amp Intersexuality Tidy Colin January 19 2016 Hypospadias Patient Patient Platform Ltd Retrieved October 18 2018 What is intersex Frequently Asked Questions and Intersex Definitions interACT Retrieved May 7 2021 Alice Dreger Do you have to pee standing up to be a real man Intersex Human Rights Australia ihra org au 2014 02 14 Retrieved 2022 03 22 IGM OII Europe 2021 02 04 Retrieved 2022 03 22 Singh S Rawat J Kureel SN Pandey A Chordee without hypospadias Operative classification and its management Urol Ann 2013 Apr 5 2 93 8 doi 10 4103 0974 7796 110005 PMID 23798865 PMCID PMC3685753 Snodgrass WT Khavari R July 2006 Prior circumcision does not complicate repair of hypospadias with an intact prepuce The Journal of Urology 176 1 296 8 doi 10 1016 S0022 5347 06 00564 7 PMID 16753427 Chalmers D Wiedel CA Siparsky GL Campbell JB Wilcox DT May 2014 Discovery of hypospadias during newborn circumcision should not preclude completion of the procedure The Journal of Pediatrics 164 5 1171 1174 e1 doi 10 1016 j jpeds 2014 01 013 PMID 24534572 a b Mieusset R Soulie M 2005 Hypospadias psychosocial sexual and reproductive consequences in adult life Journal of Andrology 26 2 163 8 doi 10 1002 j 1939 4640 2005 tb01078 x PMID 15713818 a b Rice William R Friberg Urban Gavrilets Sergey 2012 Homosexuality as a Consequence of Epigenetically Canalized Sexual Development PDF The Quarterly Review of Biology 87 4 355 356 doi 10 1086 668167 ISSN 0033 5770 Kaefer Martin Rink Richard Misseri Rosalia Winchester Paul Proctor Cathy Ben Maamar Millissia Beck Daniel Nilsson Eric Skinner Michael K 2023 01 11 Role of epigenetics in the etiology of hypospadias through penile foreskin DNA methylation alterations Scientific Reports 13 1 555 doi 10 1038 s41598 023 27763 5 ISSN 2045 2322 PMC 9834259 Urethroplasty Department of Urology 2016 06 06 Retrieved 2019 06 14 United Nations Fact Sheet Intersex PDF Loomba Albrecht Lindsey A Styne Dennis M 2017 Disorders of Sex Development American Academy of Pediatrics Textbook of Pediatric Care 2nd ed ISBN 978 1 61002 579 9 Re operation with Dr Nicol Bush amp Dr Warren Snodgrass PARC Urology Hypospadias Center 2016 07 15 Retrieved 2019 05 09 Bayne Aaron P Jones Eric A 2010 Complications of hypospadias repair In Taneja Samir S ed Complications of Urologic Surgery 4th ed W B Saunders pp 713 722 ISBN 978 1 4160 4572 4 Suh JG Choi WS Paick JS Kim SW July 2013 Surgical Outcome of Excision and End to End Anastomosis for Bulbar Urethral Stricture Korean Journal of Urology 54 7 442 7 doi 10 4111 kju 2013 54 7 442 PMC 3715707 PMID 23878686 What are some of the risks of penile surgery ISSM 2012 02 21 Retrieved 2019 06 14 Warren T Snodgrass 2013 05 13 Pediatric Urology Evidence for Optimal Patient Management Springer Science amp Business Media pp 117 ISBN 978 1 4614 6910 0 a b c Bush N Snodgrass W August 2014 Response to Re Snodgrass W et al Duration of follow up to diagnose hypospadias urethroplasty complications J Pediatr Urol 2014 10 783 784 Journal of Pediatric Urology 10 4 784 5 doi 10 1016 j jpurol 2014 04 022 PMID 24999242 Kaplan GW September 2008 Does administration of transdermal dihydrotestosterone gel before hypospadias repair improve postoperative outcomes Nature Clinical Practice Urology 5 9 474 5 doi 10 1038 ncpuro1178 PMID 18679395 S2CID 22512786 Hypospadias Retrieved 2023 03 21 a b Snodgrass WT Bush N Cost N August 2010 Tubularized incised plate hypospadias repair for distal hypospadias Journal of Pediatric Urology 6 4 408 13 doi 10 1016 j jpurol 2009 09 010 PMID 19837000 Wilkinson DJ Farrelly P Kenny SE June 2012 Outcomes in distal hypospadias a systematic review of the Mathieu and tubularized incised plate repairs Journal of Pediatric Urology 8 3 307 12 doi 10 1016 j jpurol 2010 11 008 PMID 21159560 Castagnetti M El Ghoneimi A October 2010 Surgical management of primary severe hypospadias in children systematic 20 year review The Journal of Urology 184 4 1469 74 doi 10 1016 j juro 2010 06 044 PMID 20727541 Warren T Snodgrass 2013 05 13 Pediatric Urology Evidence for Optimal Patient Management Springer Science amp Business Media pp 129 ISBN 978 1 4614 6910 0 Suoub M Dave S El Hout Y Braga LH Farhat WA October 2008 Distal hypospadias repair with or without foreskin reconstruction A single surgeon experience Journal of Pediatric Urology 4 5 377 80 doi 10 1016 j jpurol 2008 01 215 PMID 18790424 Snodgrass W Dajusta D Villanueva C Bush N August 2013 Foreskin reconstruction does not increase urethroplasty or skin complications after distal TIP hypospadias repair Journal of Pediatric Urology 9 4 401 6 doi 10 1016 j jpurol 2012 06 008 PMID 22854388 Filippelli John 2021 Living With Hypospadias Palmetto Publishing pp 24 30 ISBN 978 1638372172 Gatti JM Epidemiology Medscape Reference Retrieved 22 January 2013 The infertility of Catherine de Medici and its influence on 16th century France PDF Male or female Babies born on the sliding sex scale British Broadcasting Corporation 11 October 2011 Retrieved 2016 05 12 Littlefield Amy August 13 2018 Intersex People Want to End Nonconsensual Surgeries A California Resolution Is Their Warning Shot Rewire News Retrieved 2018 11 30 Intersexualidad Nunca me senti nina y mi comportamiento masculino era un problema ABC 20 October 2014 La barba me dio la razon aunque me criaran como una nina yo era un nino El Pais 30 June 2016 Lieberman Hallie August 29 2018 The Trigger Effect The Atavist Magazine No 82 Archived from the original on September 1 2018 Retrieved 2018 08 31 Heifetz Danny When a Dick Joke Isn t a Joke theringer com March 2020Further reading editAustin PF Siow Y Fallat ME Cain MP Rink RC Casale AJ October 2002 The relationship between mullerian inhibiting substance and androgens in boys with hypospadias The Journal of Urology 168 4 Pt 2 1784 8 discussion 1788 doi 10 1016 S0022 5347 05 64413 8 PMID 12352359 Patel RP Shukla AR Snyder HM October 2004 The island tube and island onlay hypospadias repairs offer excellent long term outcomes a 14 year followup The Journal of Urology 172 4 Pt 2 1717 9 discussion 1719 doi 10 1097 01 ju 0000138903 20136 22 PMID 15371798 Retik AB Atala A May 2002 Complications of hypospadias repair The Urologic Clinics of North America 29 2 329 39 doi 10 1016 S0094 0143 02 00026 5 PMID 12371224 Shukla AR Patel RP Canning DA August 2004 Hypospadias The Urologic Clinics of North America 31 3 445 60 viii doi 10 1016 j ucl 2004 04 020 PMID 15313054 International Trends in Rates of Hypospadias and Cryptorchidism Special issue on hypospadias Indian Journal of Urology 24 2 2008 External links edit nbsp Wikimedia Commons has media related to Hypospadias Retrieved from https en wikipedia org w index php title Hypospadias amp oldid 1222487805, wikipedia, wiki, book, books, library,

article

, read, download, free, free download, mp3, video, mp4, 3gp, jpg, jpeg, gif, png, picture, music, song, movie, book, game, games.