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Genetic and Rare Diseases Information Center (GARD)

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Duplication of urethra

Other Names for this Disease
  • Urethral duplication
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What are the signs and symptoms of duplication of urethra?

There are 3 different types of duplication of urethra. In type 1, the extra urethra arises from the primary urethra and may or may not extend to the external genitals. In type 2, the extra urethra either arises from another opening in the bladder or connects with the primary ureter at the opening of the bladder and then extends to the external genitals. The urethra can also connect with the primary urethra at the opening of the bladder and extend into the perineum (also called the Y-type). Type 3 is when there are two bladders that each give rise to a separate urethra that exits through the external genitals.[1] To view an illustration of these classifications, click here and view Figure 2 on page 2 of this journal article.

The clinical features of this abnormality are variable. People with complete urethral duplication can be asymptomatic or can present with a double stream of urine, incontinence, recurrent infections, or outflow obstructions. A double stream is the most common complaint and can be annoying, depending on where the extra opening in the genitals is located.[1]
Last updated: 7/15/2011

  1. Erdil H, Mavi A et al. Urethral Duplication. Acta Med. Okayama. 2003; Accessed 7/15/2011.