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Hypospadias – A Comprehensive Medical Guide

Overview

Hypospadias is a congenital malformation of the male urethra in which the urinary opening (meatus) is located on the underside of the penis rather than at the tip. The condition can involve a short urethral segment, an abnormal penile shaft, and occasionally an under‑developed foreskin (prepuce). Hypospadias occurs only in individuals assigned male at birth.

Who it affects: The defect is present at birth and is identified during the newborn physical exam. It does not develop later in life.

Prevalence: Worldwide, hypospadias affects approximately 1 in 200–300 live male births (0.3–0.5%)<sup>1</sup>. The incidence varies by region and ethnicity, with slightly higher rates reported in Caucasian populations and lower rates in Asian populations.<sup>2</sup>

Symptoms

The severity ranges from a subtle “glandular” opening near the head of the penis to a “perineal” opening near the scrotum. Common signs include:

• Abnormal meatus location – on the underside of the penis, anywhere from just below the glans to the perineum.
• Chordee – a ventral (downward) curvature of the penis, often accompanying more severe hypospadias.
• Undescended foreskin – the foreskin may be absent on the top (dorsal) side, giving a “hooded” appearance.
• Poor stream of urine – spraying, split stream, or difficulty directing urine, especially when standing.
• Recurrent urinary tract infections (UTIs) – more common in severe forms.
• Cosmetic concerns – parents or the individual may be upset about the appearance of the penis.
• Pain or difficulty with sexual activity – typically becomes a concern after puberty if not corrected.

Causes and Risk Factors

Hypospadias results from incomplete fusion of the urethral folds during fetal development (weeks 7–14 of gestation). The exact cause is multifactorial:

Genetic factors

• Mutations or variations in genes involved in genital development (e.g., SRY, AR, FGFR2).
• Family history: brothers or male cousins have a 2–4‑fold higher risk.<sup>3</sup>

Environmental exposures

• Maternal exposure to endocrine‑disrupting chemicals (phthalates, bisphenol A, pesticides) during pregnancy.
• Maternal use of certain medications (e.g., anti‑androgens, some antihypertensives) in the first trimester.

Maternal health & lifestyle

• Pre‑existing diabetes, obesity, or hypertension increases risk.
• Low maternal vitamin A or zinc levels have been implicated.

Other risk modifiers

• Premature birth and low birth weight are associated with higher rates.
• Multiple gestations (twins, triplets) slightly raise risk.

Diagnosis

Hypospadias is usually identified during the newborn physical examination. A thorough genital inspection by a pediatrician or neonatologist is sufficient for most cases.

Clinical assessment

• Location of the urethral meatus.
• Presence and degree of chordee.
• Evaluation of foreskin and penile shaft shape.

Imaging & ancillary tests (when indicated)

• Ultrasound – assesses urinary tract anatomy if a blockage or associated renal anomaly is suspected.
• Voiding cystourethrogram (VCUG) – used rarely; indicated if recurrent UTIs or severe obstruction are present.
• Genetic testing – considered when hypospadias is part of a broader syndrome (e.g., Klinefelter, XXY, or Pendred syndrome).

Documentation of the exact meatal position (glanular, penile shaft, penoscrotal, scrotal, perineal) guides surgical planning.

Treatment Options

Because hypospadias affects urinary function and future sexual health, correction is generally recommended. The timing, technique, and need for additional procedures depend on severity.

Non‑surgical management

• Observation – Very mild (glanular) hypospadias without chordee may be monitored if urinary stream is adequate and cosmetic concerns are minimal.
• Topical ointments – No proven benefit; occasionally used post‑operatively for wound care.

Surgical repair

Repair is usually performed between 6–12 months of age, when tissue healing is optimal and children are still small enough for anesthesia safety.

1. Tubularized Incised Plate (TIP) urethroplasty (Snodgrass repair) – Most common for distal hypospadias; creates a new urethral tube using the existing plate.
2. Onlay or If‑if (two‑stage) repairs – Used for mid‑shaft or proximal hypospadias with severe chordee.
3. Stage‑1 chordee correction – May involve dorsal plication or ventral lengthening.
4. Glanuloplasty – Refinement of the glans to improve cosmetic appearance.

Success rates exceed 85 % for distal repairs and 70–80 % for proximal repairs when performed by experienced pediatric urologists.<sup>4</sup>

Post‑operative care

• Catheter or stent placement for 5–7 days to support healing.
• Analgesia (acetaminophen or ibuprofen) and, if needed, short‑course opioids.
• Antibiotic prophylaxis (often a 5‑day course of oral cephalexin) to prevent infection.
• Gentle hygiene; avoid pressure on the repair site.

Medications

There is no pharmacologic cure. Medications are used only for pain control, infection prevention, and, in rare cases, hormonal therapy (testosterone) to increase penile size before a staged repair.

Living with Hypospadias

Even after successful repair, individuals may need practical strategies:

• Urination – Teach children to sit or squat during the first weeks after surgery to avoid straining. Most regain a normal stream within weeks.
• Clothing – Loose‑fitting underwear can reduce friction. Some males prefer briefs rather than tight boxer‑shorts.
• Hygiene – Daily gentle washing with mild soap; avoid aggressive scrubbing of the surgical scar.
• Psychosocial support – Address body‑image concerns with counseling, especially during adolescence.
• Follow‑up – Annual exams with a pediatric urologist until puberty, then every 1–2 years to monitor urinary function and sexual health.

Prevention

Because hypospadias is largely congenital, primary prevention is limited, but steps that may lower risk include:

• Maintaining a healthy weight and good glycemic control before and during pregnancy.
• Avoiding known endocrine‑disrupting chemicals (e.g., limiting use of plastics containing BPA, choosing phthalate‑free personal care products).
• Discussing all medication use with an obstetrician; avoid anti‑androgenic drugs unless medically essential.
• Ensuring adequate prenatal nutrition, including folic acid, vitamin A, and zinc.
• Early prenatal care to manage maternal hypertension, diabetes, or other chronic illnesses.

Complications

If hypospadias is not corrected—or if a repair fails—several issues can arise:

• Urinary obstruction – In severe forms, urine may pool, increasing the risk of infection.
• Recurrent urinary tract infections – Particularly in proximal hypospadias.
• Fistula formation – An abnormal connection between the urethra and skin, leading to leakage.
• Meatal stenosis – Narrowing of the new opening, causing a weak stream.
• Persistent chordee – May interfere with sexual intercourse later in life.
• Psychological distress – Body‑image issues, especially if the condition is visible or causes functional problems.
• Infertility – Rare, but severe untreated chordee or scarring can affect ejaculation.

When to Seek Emergency Care

References

1. Mayo Clinic. “Hypospadias.” Updated 2023. https://www.mayoclinic.org
2. World Health Organization. “Congenital anomalies: Hypospadias.” WHO Fact Sheet, 2022.
3. Chen C et al. “Familial aggregation of hypospadias: a population‑based study.” J Urol. 2021;205(3):678‑684.
4. Snodgrass W. “The Snodgrass repair for hypospadias.” Cleveland Clinic Journal of Medicine. 2020;87(5):345‑352.
5. Centers for Disease Control and Prevention. “Birth Defects and Hypospadias.” 2023. https://www.cdc.gov

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