[Infantile hemangiopericytoma: a clinico-morphological study of 10 cases].

: Infantile hemangiopericytoma (IH) is a rare mesenchymal tumor of the extremity and trunk soft tissues with medium potential grade. Its clinical course and prognosis on the basis of morphological evidence are unpredictable. IH consists of CD34-positive fibroblasts forming around fissural vessels. Some tumors feature non-hemangiopericytic structures. IH is morphologically identifiable by comparing with other infantile fibroblastic tumors, such as myofibroma and solitary fibrous tumor. Immunomorphological examination is essential to assure proper diagnosis of IH.