Benign lesions / conditions

Topic Completed: 1 March 2012

Revised: 26 February 2019

Copyright: 2003-2019,, Inc.

PubMed search: prostatic cystadenoma

Komal Arora, M.D.
Page views in 2018: 468
Page views in 2019 to date: 350
Cite this page: Arora K. Cystadenoma. website. Accessed November 13th, 2019.
Definition / general
  • May extend into retroperitoneum and be attached to prostate by a small pedicle
  • May be termed ectopic prostate if detached from prostate
  • Benign behavior, but may coexist with adenocarcinoma (Pathol Int 2010;60:413)
Case reports
Gross images

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Multilocular mass (fig 1C)

Microscopic (histologic) description
  • Large, multilocular mass of glands / cysts lined by prostate-type epithelium in hypocellular fibrous stroma
Microscopic (histologic) images

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Various images

Positive stains
  • PSA, PAP
Differential diagnosis
  • Nodular hyperplasia: hyperplasia of glands and stroma with papillary buds, infoldings and cysts
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