Abstract
An extremely rare case of primary hemangiopericytoma of the chest wall is reported. A 46-year-old female was admitted to the hospital because of a right back pain. An extrapleural tumor of 2.0×2.0cm in size was detected by the chest computerized tomography (CT) scanning. The tumor was excised with a part of the 4th and 5th ribs. The pathohistological diagnosis was low-grade malignant hemangiopericytoma. Tumor cells were immunostained positively only to vimentin. The postoperative course was unevenful. The patient is now doing well as of 7 months after the operation. Hemangiopericytomy is a vascular tumor in which pericytic cells of vessel walls proliferate. It often recurs or metastasizes in spite of its benign histopathological feature. So careful follow up is important. It commonly occurs in the soft tisues of the lower extremities, especially in the thigh, perive cavity, and retroperitoneum, and rarely in the chest wall. This paper also describes a review of hemangiopericytoma arising of the chest wall seen in the Japanese literature.
