Penis & scrotum


Mucoid cyst

Last author update: 1 May 2010
Last staff update: 5 March 2021

Copyright: 2002-2023,, Inc.

PubMed Search: Mucoid cyst penis

Alcides Chaux, M.D.
Antonio L. Cubilla, M.D.
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Cite this page: Chaux A, Cubilla AL. Mucoid cyst. website. Accessed October 3rd, 2023.
Definition / general
  • Inflammatory lesion due to accessory urethral canals (entrapped urothelium during development) on foreskin or glans, with intraepithelial mucous cells or glands
  • Also includes some median raphe cysts (uncommon; found from distal penis and scrotum toward the perineum in a midline position; considered a congenital alteration in embryologic development, Urology 2008;71:830)
Clinical features
  • Slow growing painless cystic mass
  • Often has an incorrect clinical and pathologic diagnosis (J Urol 1976;115:397)
Case reports
  • Excision is curative
Clinical images

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Median raphe cysts

Microscopic (histologic) description
  • Epithelium is stratified columnar with intraepithelial mucous cells or associated mucous glands
Microscopic (histologic) images

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Pseudostratified columnar epithelium

Single larger mucinous cell within epithelium




Positive stains
Negative stains
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