Infantile hemangiopericytoma is an uncommon cause of a soft-tissue mass in the neonatal period. Only 86 of these tumors have been reported in the literature. Thirty of these were located in the extremities. This review presents a case of infantile hemangiopericytoma localized to the knee in an 8-month-old infant. Current literature suggests that the majority of these lesions are benign, and surgical excision is curative. Recurrence and metastatic disease rarely occur. Because 30-50% of infantile hemangiopericytomas occur in the extremities, orthopaedic surgeons should be aware of and familiar with this tumor.
From the Divisions of Orthopaedics and Pathology, Children's Hospital of Eastern Ontario, University of Ottawa, Ottawa, Ontario, Canada.
Study conducted at Children's Hospital of Eastern Ontario, Ottawa, Ontario, Canada
Address correspondence and reprint requests to Dr. M. Letts, Department of Surgery, Children's Hospital of Eastern Ontario, 401 Smyth Road, Ottawa, Ontario, Canada K1H 8L1.