title: CT and MR features of primary pulmonary hemangiopericytomas.
abstract: We investigated the radiological findings of four patients with malignant pulmonary hemangiopericytomas, comparing plain chest radiography, CT, and MR. The radiographic presentation ranged from a small single lesion to a tumor almost completely occupying a hemithorax. Pathognomonic radiological features of malignant pulmonary hemangiopericytomas could not be established, but characteristic features include a large lobulated well-circumscribed mass with an encapsulated appearance, contrast enhancement of the margin, and no signs of surrounding compression atelectasis. The tumors were associated with late onset or a paucity of chest symptoms. Additional information regarding heterogeneity and effects on adjacent structures was provided by MR and was helpful in suggesting the diagnosis of malignant pulmonary hemangiopericytoma.
authors.affiliation: Department of Diagnostic Radiology, Freiburg University Hospital, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Halle
authors.forename: U
authors.initials: U
authors.lastname: Blum
authors.forename: E
authors.initials: E
authors.lastname: Dinkel
authors.forename: W
authors.initials: W
authors.lastname: Brugger
mesh_terms: D000328:Adult; D002114:Calcinosis / Q000000981:diagnostic imaging; D003287:Contrast Media; D005260:Female; D006393:Hemangiopericytoma / Q000175:diagnosis* / Q000000981:diagnostic imaging*; D006801:Humans; D008175:Lung Neoplasms / Q000175:diagnosis* / Q000000981:diagnostic imaging*; D008279:Magnetic Resonance Imaging; D008297:Male; D008875:Middle Aged; D001261:Pulmonary Atelectasis / Q000175:diagnosis / Q000000981:diagnostic imaging; D014057:Tomography, X-Ray Computed
chemical_list: D003287:Contrast Media