Salivary glands
Epithelial / myoepithelial tumors
Basal cell adenocarcinoma

Author: Adriana Handra-Luca, M.D. (see Authors page)

Revised: 13 March 2018, last major update September 2012

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

PubMed Search: Basal cell adenocarcinoma[TI] salivary

Cite this page: Handra-Luca, A. Basal cell adenocarcinoma. PathologyOutlines.com website. http://www.pathologyoutlines.com/topic/salivaryglandsbasalcelladenocarcinoma.html. Accessed December 13th, 2018.
Definition / general
  • Low grade malignant counterpart of basal cell adenoma; infiltrative with perineurial invasion and vascular invasion (Mod Pathol 2002;15:298)
  • Also called basaloid carcinoma
Clinical features
  • 1 - 2% of salivary gland carcinomas
  • Malignant counterpart of basal cell adenoma - 23% arise within preexisting basal cell adenomas
  • Associated with dermal cylindromas
  • Slow growing
  • Usually parotid gland, adults, ages 50+, also in minor salivary glands
  • No gender predilection
  • Locally destructive
  • 37% recur locally, 8% metastasize (solid pattern) to lymph nodes, 4% to lungs but death from disease is unusual
Treatment
Gross images

Images hosted on other servers:

Bisected specimen with focal hemorrhage

Microscopic (histologic) description
  • Low grade malignancy similar to basal cell adenoma but infiltrative with perineurial invasion and vascular invasion
  • Multicentric, variable cytologic atypia and mitotic activity
  • Two cell types: small cells with scant cytoplasm and dark nuclei (may show palisading pattern) and polygonal cells with eosinophilic / amphophilic cytoplasm and clear nuclei
  • Patterns: solid, trabecular, tubular, membranous
  • No myxoid matrix, no cyst formation
Microscopic (histologic) images

Images hosted on other servers:

Various images

Positive stains
Negative stains
Differential diagnosis