Abstract Background Hemangiopericytoma (HPC) is an extremely rare aggressive tumor of mesenchymal origin, which constitutes less than 1% primary tumors the central nervous system. Typically it occurs in young adults (mean age at diagnosis 30-50 years). Initially described as gemmangiomas, was first called hemangiopericytoma 1942 but considered a variant meningioma until 1993 when finally recogn...

Hemangioperycytoma is a rare perivascular tumor that seldom involves the urogenital system. This tumor often appears with an unspecific clinical picture, and sometimes is associated with hematuria or hypertension. Diagnosis is based on a combination of histological and immunohistological findings. We report a case of a 52-year-old patient with renal hemangiopericytoma who underwent surgical tre...

Haemangiopericytoma is a rare, highly vascular, slow-growing tumour which has both malignant and benign varieties. We report a case of a 63-year-old man in whom it was treated by initial radiotherapy followed by complete surgical excision. The preoperative radiotherapy markedly reduced the vascularity of the tumour. A brief review of the pathology and nature of tumour is provided. q 1999 Elsevi...

A 12-year-old girl had a 6-year history of a large soft-tissue mass in her left orbit. The tumor biopsy was previously performed elsewhere when she was 7 years old, but no treatment was offered at that time. Later, the tumor was completely excised, and histologic examination revealed a mesenchymal neoplasia with typical hemangiopericytoma features. At 9 months of follow up, no evidence of local...

Hemangiopericytomas are vascular tumors with a susceptibility to arise anywhere in the human body. We present a case of a 68year-old female with primary omental hemangiopericytoma and a two-time recurrence managed with surgery and close follow-up. The first recurrence was at 52 months and the second at 37 months following the prior presentation. No adjuvant chemotherapy or radiation therapy was...

A 27-year-old female was referred with an abdominal mass. Examination revealed a non tender firm mass in the right flank and hypertension (200/100 mmHg). An angiomyolipoma was suspected on computed tomography and arteriography and a radical nephrectomy was performed. On cut section, the kidney was occupied by a well-capsulated, grayish tumor measuring 10 x 9 cm. Pathological diagnosis was a ren...

Hemangiopericytoma (HPCT) rarely originates in the lacrimal sac; 7 cases have been reported previously and only 1 contained an ultrastructural study. In this article we report an additional case and review the previous reports. While the initial biopsy specimen showed nonspecific cytologic abnormalities, light and electron microscopic studies on the subsequently excised tumor demonstrated that ...

Myopericytoma is a rare benign tumor with perivascular myoid differentiation. It shares histomorpholoic features with the so-called hemangiopericytoma, myofibroma and glomus tumor. We hereby report the case of a 14-year-old boy who presented with a slowly growing, painless, firm mass on upper lip, diagnosed as myopericytoma on the basis of histopathology and immunohistochemistry. To the best of...