Figure 4From: Clinicopathological features and the value of differential Cytokeratin 7 and 20 expression in resolving diagnostic dilemmas of ovarian involvement by colorectal adenocarcinoma and vice-versaA. Primary ovarian adenocarcinoma showing slit-like spaces reminiscent of endometrioid pattern. H&E × 200. B. Focal psammomatous calcification (arrows). H&E × 200. C. IHC results. Positive CK 7 expression. DAB × 200 D. Negative CK20 expression. DAB × 200.Back to article page