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Washington University Experience | NEOPLASMS (METASTASES) | Microscopic | 1B1 Metastasis, colon (Case 1) CK 7

1B1,2 The tumor cells stain minimally for Cytokeratin 7 (CK7, 1B1) and strongly for cytokeratin 20 (CK20, 1B2). The CK7-/CK20+ pattern is typical (but not pathognomonic) for colon adenocarcinoma

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