Cytokeratin 5 (CK5)
Cytokeratin 5 (CK5) is a protein made by epithelial cells in the skin, breast, salivary glands, urinary tract, and upper aerodigestive tract. Within these organs, CK5 is commonly seen in specialized squamous cells, basal cells, and myoepithelial cells. This type of protein is also made by some benign (noncancerous) and malignant (cancerous) tumours that start …
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