Hemangiopericytoma

Steven H. Lin and Ramesh Rengan

Background

Are hemangiopericytomas benign or malignant lesions?

Hemangiopericytomas are malignant lesions −(sarcomatous lesions of vessels).

What is the cell of origin of hemangiopericytomas?

Hemangiopericytomas were originally thought to −originate from pericytes of the smooth muscle cells of vessels but are now felt to be of fibroblastic origin.

From which other tumor is a hemangiopericytoma of the meninges difficult to distinguish?

Solitary fibrous tumor. The consensus view is that solitary fibrous tumors and hemangiopericytomas belong to the same spectrum of tumors of fibroblastic origin.

What is the most common location of hemangiopericytoma?

The most common location for hemangiopericytomas is in the lower extremity

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