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Explain of Neoplasia

40. Adenocarcinoma, stomach, cytokeratin positive by immunoperoxidase stain, high power microscopic

This gastric adenocarcinoma is positive for cytokeratin by immunoperoxidase. This is a typical staining reaction for carcinomas and helps to distinguish carcinomas from sarcomas and lymphomas. Immunoperoxidase staining is helpful to determine the cell type of a neoplasm when the degree of differentiation, or morphology alone, does not allow an exact classification.

（本图片资料来源自美国犹他大学）