Craniofacial hemangiopericytoma associated with oncogenic osteomalacia: case report.

A craniofacial hemangiopericytoma associated with oncogenic osteomalacia is described and the literature is reviewed. A 46 year-old male with multiple fractures and hypophosphatemia was found to have a craniofacial mass extending from the right ethmoid sinus into the right frontal lobe. Initial detection of the tumor was made with an 111Indium-pentreotide scan (Octreoscan). Gross total resection of the tumor was achieved and the patient received postoperative radiation therapy. One year after surgery, the patient remains free of tumor with significant increase in bone density and normal phosphate levels. This is the first report of a hemangiopericytoma invading the brain that was associated with paraneoplastic hypophosphatemia and osteomalacia. Also, this is the first reported detection of a hemangiopericytoma by an Octreoscan. Primary detection and secondary surveillance of hemangiopericytomas may be possible with serial Octreoscans.