Fig. 3From: A case report of prostate cancer metastasis to the stomach resembling undifferentiated-type early gastric cancerImmunohistochemical staining of the resected specimen. The tumor was negative for CK7 (a), CK20 (b), and PSA (c) and was positive for PSAP (d). CK, cytokeratin; PSA, prostate-specific antigen; PSAP, prostate-specific acid phosphataseBack to article page