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Stains
Cytokeratin 5 (CK5, K5)

Reviewer: Nat Pernick, M.D. (see Reviewers page)
Revised: 15 October 2013, last major update June 2005
Copyright: (c) 2003-2013, PathologyOutlines.com, Inc.
PubMed Search: CK5[title]

General
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Interpretation
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Uses by pathologists
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Positive staining - normal
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Micro images
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Breast carcinoma-basal subtype in BRCA1 patient

Breast - various

Gallbladder adenosquamous carcinoma

Mesothelioma

Mesothelioma deciduoid

Ovarian serous carcinoma


Pancreas-adenosquamous carcinoma

Squamous cell carcinoma-oral (fig a)

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

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)


Contributed by Leica Microsystems, Biosystems Division-

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

Additional references
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End of Stains > Cytokeratin 5 (CK5, K5)


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