CYFRA 21-1 IS A PROTEIN FRAGMENT DERIVED FROM CYTOKERATIN 19, A COMPONENT OF THE CYTOSKELETON FOUND IN VARIOUS EPITHELIAL CELLS. ITS PRIMARY CLINICAL USE IS IN THE MANAGEMENT OF NON-SMALL CELL LUNG CANCER (NSCLC), PARTICULARLY THE SQUAMOUS CELL CARCINOMA SUBTYPE.
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2 ML (0.5 ML MIN.) SERUM FROM 1 SST. SHIP REFRIGERATED OR FROZEN. PROVIDE BRIEF CLINICAL HISTORY.