Stains & molecular markers
Cytokeratin 4 (CK4, K4)

Topic Completed: 1 October 2013

Minor changes: 15 December 2020

Copyright: 2003-2021,, Inc.

PubMed Search: ck4[title]

Nat Pernick, M.D.
Page views in 2020: 134
Page views in 2021 to date: 3
Cite this page: Pernick N. Cytokeratin 4 (CK4, K4). website. Accessed January 17th, 2021.
Definition / general
Uses by pathologists
  • No significant clinical use by pathologists
Case reports
Positive staining - normal
  • Suprabasal cells of nonkeratinized stratified squamous epithelium of esophagus and cornea; also anus, larynx, pharynx, tongue (J Biol Chem 1998;273:23912)
Additional references
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