title: Chronic expanding hematoma.
abstract: Two cases of chronic expanding hematoma are presented. Although the location and presentation vary, chronic expanding hematoma has a distinct histopathologic pattern. A diagnosis of neoplasm is suggested by its slow growth pattern. The criteria for their formation are incompletely understood, and in one case, a hematoma occurred despite apparent adequate drainage. Computed tomography is helpful in distinguishing chronic expanding hematoma from other soft-tissue masses.
mesh_terms: D000328:Adult; D001415:Back / Q000098:blood supply; D003937:Diagnosis, Differential; D004322:Drainage; D006406:Hematoma / Q000209:etiology / Q000473:pathology* / Q000601:surgery; D006801:Humans; D007866:Leg / Q000098:blood supply; D008297:Male; D008875:Middle Aged; D012509:Sarcoma / Q000473:pathology; D013524:Surgical Flaps / Q000009:adverse effects