Updated: 12/8/2020

Hypospadias / Epispadias

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Topic
  • Introduction
    • Embryological malformations of the urethra (urethral groove)
      • may involve the urethral folds or genital tubercle
    • Two main types
      • epispadias
        • urethra opens on dorsal surface of penis
          • urine goes ↑
        • defect in the genital tubercle
      • hypospadias
        • urethra opens on ventral surface of penis
          • urine goes ↓
        • defect in closure of urethral folds
          • secondary to abnormal androgen production
        • associated with a ventral curvature of the penis (chordee)
        • risk factors
          • monozygotic twins
          • potential association with in-vitro fertilization (IVF)

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Questions (1)

(M1.RP.12.19) A newborn male is found to have the urethral opening on the ventral side of his penis. Figure A demonstrates this defect in an adult. This abnormality is a result of which of the following?

QID: 101913
FIGURES:

Incomplete fusion of the urachal duct

7%

(8/114)

Incomplete fusion of the urethral folds

83%

(95/114)

Incomplete fusion of the labioscrotal swellings

5%

(6/114)

Dysgenesis of the genital tubercle

3%

(3/114)

Vitelline fistula

0%

(0/114)

M 1 E

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Evidence (2)
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EXPERT COMMENTS (1)
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