By immunohistochemistry, the tumor cells were positive for vimentin and α-1-antichymotrypsin; negative for cytokeratin 7 (CK7), CK19, CK8/18, hepatocyte paraffin, mucin-1, cluster of differentiation 31 (CD31), CD34 and AFP; and the positive rate of Ki67 was 80%. Here, KRT7 is linked to neoplasm.