Figure 3

Postoperative micrographs of liver mass. (A) Postoperative histological examination of tumor exhibited that nests of malignant epidermoid cells were intimately mixed with mucus-producing cells. (B) The Alcian blue-positive material was seen in lumen of gland structure and the mucin-producing cells within the nest of epidermoid cells. (C) Tumor cells were diffusely positive for CK7. (D) The epidermoid cells were observed to be positive for p63, but the mucin-producing cells (black arrows) were p63-negative. (E) The lymph nodes metastasis of tumor was observed. (F) The metastatic tumor cells were also positive for p63 partially. (A and E, HE staining with original magnification × 400; B, Alcian blue staining with original magnification × 400; C, D and F, immunohistochemical staining with original magnification × 400).