Cytokeratin 5 (CK5, K5)

Author: Nat Pernick, M.D.

Revised: 15 May 2018, last major update October 2013

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

PubMed Search: ck5[title]
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Cite this page: Pernick, N. Cytokeratin 5 (CK5, K5). website. Accessed January 20th, 2019.
Definition / general
Uses by pathologists
Positive staining - normal
Microscopic (histologic) images

Images hosted on Pathout server:

Contributed by Leica Microsystems, Biosystems Division

Mesothelioma CK5
(XM26) with intense
cytoplasmic and
membranous staining

Images hosted on other servers:

Mesothelioma deciduoid

Squamous cell carcinoma-oral (fig a)

Benign epithelial
inclusions of axillary
lymph nodes;
fig 1: CK5/6+; 2: p63+

Additional references