title: [Primary malignant hemangiopericytoma of the lung].
mesh_terms: D000293:Adolescent; D000328:Adult; D003937:Diagnosis, Differential; D006393:Hemangiopericytoma / Q000473:pathology*; D006801:Humans; D008175:Lung Neoplasms / Q000473:pathology*; D008297:Male; D008875:Middle Aged