Figure 5

Histological appearance of high-magnification view of the liver tumor. Histological appearance of high-magnification view of the liver tumor (A, hematoxylin and eosin stain × 400) and immunohistochemical expression (×200) of CK20 (B). (A) Cells with scanty cytoplasm and small round nuclei, proliferating in the trabecular and clumps with fibrosis. Nuclei are clear pale with delicate chromatin. (B) CK20 is positive. The edge of the tumor was observed in the staining of perinuclar dot pattern, which is typical finding of MCC.