title: Sonographic findings in four cases of hemangiopericytoma. Correlation with computed tomographic, angiographic, and pathologic findings.
abstract: Four patients with hemangiopericytoma were examined with gray-scale sonography. Three of these patients were also evaluated by computed tomography (CT). The sonographic findings included well-defined, predominately cystic masses in two patients, a mixed solid and cystic mass in one, and a solid mass with shadowing in another. One hemangiopericytoma changed in sonographic appearance from cystic to solid following radiation. CT identified well-circumscribed masses in all three cases, but added little beyond what was seen on plain radiographs. Sonography may define the limits of a hemangiopericytoma, give information about the internal structure, and offer a way of following response to therapy. However, the sonographic features are varied and the often cystic nature of these tumors may be misleading.
mesh_terms: D000328:Adult; D000792:Angiography; D005260:Female; D006393:Hemangiopericytoma / Q000175:diagnosis*; D006801:Humans; D008297:Male; D012983:Soft Tissue Neoplasms / Q000175:diagnosis*; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography