PMC

Histologically, several bleeding points were seen at the bottom of intestinal villi. There was no ulcer formation on the mucosal surface.

A — Full surgical abdominal exploration revealed a round dark red-violet mass located between the cecum and proximal colon. B, C — Histopathological diagnosis was consistent with an intestinal HSA with complete excision.

Histopathological examination of (A, B) colonic HSA and (C, D) hepatic HSA. A, C — Hematoxylin and eosin stain revealed marked nuclear atypia (arrowhead) and moderate mitotic activity of tumor cells (arrow). B, D — Immunohistochemical staining confirmed moderate membranous-cytoplasmic expression of factor VIII in tumor cells.

Contrast enhanced computed tomography scanning performed after emergency liver lobectomy detected a 3-cm hypodense, non-enhancing cystic lesion in the right middle liver lobe (asterisk). The gallbladder was compressed and displaced caudally due to mass effect (arrow). Transverse image of cranial (A) and middle (B) part of liver.