Stains & molecular markers
Cytokeratin 13 (CK13, K13)

Topic Completed: 1 October 2013

Minor changes: 15 December 2020

Copyright: 2003-2021,, Inc.

PubMed Search: CK13[title]

Nat Pernick, M.D.
Page views in 2020: 326
Page views in 2021 to date: 15
Cite this page: Pernick N. Cytokeratin 13 (CK13, K13). website. Accessed January 20th, 2021.
Definition / general
Uses by pathologists
  • No significant clinical use by pathologists
Positive staining - normal
  • Suprabasal layers of non-cornified stratified epithelium, including squamous (non-keratinized) epithelia of cervix, esophagus, larynx, oral cavity, tonsils, urothelium, and respiratory-type epithelium
  • May be filled with mucoid material or foamy macrophages
Positive staining - disease
  • Brenner tumor
  • Squamous metaplasia
  • Squamous cell carcinoma (10%)
  • Urothelial carcinoma (well differentiated)
Negative staining
  • Epidermis
Additional references
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