Benign lesions / conditions

Authors: Komal Arora, M.D. (see Authors page)

Revised: 21 July 2016, last major update March 2012

Copyright: (c) 2003-2016,, Inc.

PubMed search: prostatic cystadenoma
Cite this page: Cystadenoma. website. Accessed December 15th, 2018.
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

Images hosted on other servers:

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