title: Progressive multifocal leukoencephalopathy: cerebral mass lesions.
abstract: In 9% of reported cases, progressive multifocal leukoencephalopathy presents clinically and radiographically as a focal cerebral mass lesion. Initial misdiagnosis may occur, leading to surgery for suspected malignancies. The electroencephalographic, radiologic, and histopathologic findings in such cases are discussed.
mesh_terms: D003937:Diagnosis, Differential; D004569:Electroencephalography; D006801:Humans; D007968:Leukoencephalopathy, Progressive Multifocal / Q000175:diagnosis* / Q000209:etiology / Q000473:pathology; D014057:Tomography, X-Ray Computed