Stains
Cytokeratin 5 (CK5, K5)

Author: Nat Pernick, M.D. (see Authors page)

Revised: 4 December 2015, last major update October 2013

Copyright: (c) 2003-2015, PathologyOutlines.com, Inc.

PubMed Search: ck5[title]
Definition / General
Interpretation
Uses by Pathologists
Positive Staining - Normal
Micro Images

Images hosted on Pathout server:

Contributed by Leica Microsystems, Biosystems Division-

Mesothelioma-Cytokeratin 5 (XM26) with intense cytoplasmic and membranous staining



Images hosted on other servers:

Breast carcinoma-basal subtype in BRCA1 patient

Gallbladder adenosquamous carcinoma

Mesothelioma

Mesothelioma deciduoid

Squamous cell carcinoma-oral (fig a)


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



Images hosted on Nature.com:

Breast - various

Ovarian serous carcinoma

Pancreas-adenosquamous carcinoma


Various images #1 (squamous cell-fig 1A, urothelial-fig 1C, thymoma-fig 1E, salivary gland adenoid cystic-fig 1G)


#2 (ovary-fig 2A, endometrioid adenocarcinoma of uterus-fig 2C, infiltrating ductal carcinoma of breast-fig 2E)

Additional References