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Pathology for Urologists

Diphallus and Aphallia


Image A
(click on the image above)

Image B
(click on the image above)

Diphallus

  • Duplication of the penis
  • Rare anomaly that may range from small accessory penis to the real deal – times two (image A).
  • Associated anomalies: hypospadias, bifid scrotum, duplicated bladder, renal agenesis/ ectopia, etc.

Aphallia (penile agenesis)

  • Results from failure of the genital tubercle to develop.
  • Incidence: 1/10,000,000 live male births (only 70 reported cases).
  • Usually has appearance of well-developed scrotum with bilaterally descended testes, but no penile shaft (image B).
  • Urethral opening most often on the anal verge adjacent to a small skin tag; otherwise, may be in rectum.
  • Associated anomalies: cryptorchidism, horseshoe kidney, renal agenesis, imperforate anus, etc.

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