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Hypospadius / Epispadius

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Topic updated on 04/29/15 7:12pm

 
 
 
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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Qbank (1 Questions)

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(M1.RP.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? Topic Review Topic
FIGURES: A          

1. Incomplete fusion of the urachal duct
2. Incomplete fusion of the urethral folds
3. Incomplete fusion of the labioscrotal swellings
4. Dysgenesis of the genital tubercle
5. Vitelline fistula

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