Hemangiopericytoma of the Greater Omentum

Abstract

A 41-year-old Chinese woman was admitted to our hospital with epigastric pain. Computed tomography detected a heterogeneous enhancement tumor fed by the left gastroepiploic artery in the left lower quadrant and cholelithiasis. Excision of the tumor in the greater omentum and cholecystectomy were performed laparoscopically. Histological findings confirmed a diagnosis of hemangiopericytoma with low-grade malignancy. To our knowledge, hemangiopericytoma of the greater omentum is very rare, and only 12 cases were reported in English literature. We report a case of hemangiopericytoma arising in the greater omentum and review the literature.

Multi-recurring extraplueural malign solitary fibrous tumor of breast: A case report and review of the literature

“…Bölgesel lenf nodu invazyonu nadir, uzak metastazlar ise genelde akciğer ve karaciğere olmakla birlikte, kemik, mezenter, omentum, mediastinum ve retroperitonadir (19,20) . MSFT genellikle agresif seyrederler, nüks ve metastaz yapmaya meyillidir (16) .…”

“…Tümörün 5 cm'den büyük olması, artmış mitotik aktivite, yüksek sellülerite, immatür veya pleomorfik tümör hücreleri, kanama ve nekroz odaklarının tespit edilmesi malignite göstergesidir (20,21) . Bu özellikler bizim olgumuzda da saptanmıştır.…”

Unusual peritonitis: ruptured (perforated) malignant hemangiopericytoma of the sigmoid mesocolon

“…In 1942, Arthur Purdy Stout and Margaret Murray coined the term "hemangiopericytoma" for a tumor derived from the cells of the outer walls of capillaries (3). It may occur anywhere, the most common location being the lower extremities, the pelvis, the head and neck and retroperitoneum (1-3).…”

“…Hemangiopericytomas are classified as benign or malignant. Recent reports proposed that a malignant hemangiopericytoma is suspected for tumors larger than 5 cm showing high mitotic activity (more than four mitoses per 10 high-power fields), necrosis and hemorrhage within the tumor (2,3). The curative treatment for hemangiopericytomas is adequate surgical resection.…”

Haemangiopericytoma/solitary fibrous tumour of the greater omentum

“…Haemangiopericytoma is a very rare tumour of the Zimmermann pericyte. [1,2] A pericyte is a cell found in the wall of capillaries, originally described by Stout and Murray. [1] Pericytes have a contractile function that helps to regulate blood flow in the capillaries.…”