Other carcinomas
Adenoid basal cell tumor

Authors: Komal Arora, M.D.

Revised: 10 April 2018, last major update February 2012

Copyright: (c) 2003-2018,, Inc.

PubMed search: prostatic adenoid basal cell tumor
Cite this page: Arora, K. Adenoid basal cell tumor. website. Accessed October 17th, 2018.
Definition / general
  • Also known as adenoid cystic-like tumor, basal cell carcinoma, adenoid basal proliferation of uncertain significance
  • Resembles to some extent the salivary gland tumor
  • Usually indolent; cases with aggressive behavior often have large solid nests with central necrosis, high Ki67%, less staining with basal cell markers (Am J Surg Pathol 2007;31:697)
Case reports
Microscopic (histologic) description
  • Expansive (not circumscribed) growth pattern
  • Multinodular, basaloid cells in clusters, some with punched out lumens
  • Surrounding fibromyxoid stroma, squamous differentiation, merges with basal cell hyperplasia
  • May be associated with minor component of usual type prostatic adenocarcinoma
  • Considered malignant if extensive infiltration between normal prostate gland, extension out of the prostate, perineural invasion, necrosis or metastases
  • Gleason grading of these tumors is not recommended
Microscopic (histologic) images

Images hosted on other servers:

Various images

Positive stains
  • 34betaE12
  • p63
Negative stains
  • PSA / PAP