To the Editor:
Primary hepatic neuroendocrine carcinoma (PHNEC) com- bined/collided with hepatocellular carcinoma (HCC) is a rare and intriguing disease with characteristics of two histologically differ- ent cancers. Usually, a combined type refers to the cases in which hepatic neuroendocrine carcinoma (HNEC) and HCC components intermingle with each other and cannot be clearly separated in the transitional areas, while a collision type refers to those in which the two distinct cancers occurred simultaneously and in- dependently.