Updated: 4/29/2015

Hypospadius / Epispadius

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Questions
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Introduction
  • Embryological malformations of the urethra (urethral groove)
    • may involve the urethral folds or genital tubercle 
  • Two main types
    • epispadius
      • urethra opens on dorsal surface of penis
        • urine goes ↑
      • defect in the genital tubercle
    • hypospadius
      • 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
 

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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? Tested Concept

QID: 101913
FIGURES:
1

Incomplete fusion of the urachal duct

7%

(3/44)

2

Incomplete fusion of the urethral folds

77%

(34/44)

3

Incomplete fusion of the labioscrotal swellings

11%

(5/44)

4

Dysgenesis of the genital tubercle

0%

(0/44)

5

Vitelline fistula

0%

(0/44)

M 1 E

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Evidence (2)
Topic COMMENTS (1)
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