title: Failure of computerized axial tomography to demonstrate a chronic subdural hematoma.
abstract: A chronic subdural hematoma may present in a computerized axial tomography (CAT) scan with the same density as normal brain tissue. The presence of a lesion may be suggested only by its mass effect. The lack of contrast enhancement or edema may help to differentiate a chronic subdural hematoma for a neoplasm or a cerebrovascular accident.
mesh_terms: D000368:Aged; D002908:Chronic Disease; D003201:Computers; D006408:Hematoma, Subdural / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D014056:Tomography, X-Ray