Cowper duct syringocele

Cowper duct syringocele refers to a cystic dilatation of the main duct of the bulbourethral (Cowper) glands.

Four groups of syringoceles have been described 2

  • simple syringocele:
    • minimally dilated duct
    • most frequent
  • perforate syringocele:
    • bulbous duct that drains into the urethra via a patulous ostium
    • can appear as a diverticulum
  • imperforate syringocele: bulbous duct that resembles a submucosal cyst and appears as a radiolucent mass
  • ruptured syringocele: fragile membrane that remains in the urethra after a dilated duct ruptures.

Affected patients may present with postvoid dribbling, urinary frequency, weak stream, or haematuria.


May be seen an a unilocular cystic lesion at the posterior or posterolateral aspect of the posterior urethra 8


Usually seen as a midline oval structure at the penile base adjacent to the ventral aspect of the proximal bulbous urethra. Signal characteristics include

  • T2: high signal intensity

Treatment options include surgical incision of the obstructed duct (considered generally curative).

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Article information

rID: 52717
System: Urogenital
Synonyms or Alternate Spellings:
  • Cowper's syringocele
  • Cowper syringocele
  • Cowper's syringocoele
  • Cowper gland syringocele
  • Cowper's gland syringocele
  • Cowper's duct syringocele
  • Bulbourethral duct syringocele
  • Bulbourethral duct syringoceles

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