title: Case records of the Massachusetts General Hospital. Weekly clinicopathological exercises. Case 45-1988. A 67-year-old woman with chronic lymphocytic leukemia, homonymous hemianopia, confusion, and poor balance.
mesh_terms: D000368:Aged; D001921:Brain / Q000473:pathology; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D007577:JC Virus / Q000302:isolation & purification; D015451:Leukemia, Lymphocytic, Chronic, B-Cell / Q000175:diagnosis / Q000473:pathology*; D007968:Leukoencephalopathy, Progressive Multifocal / Q000175:diagnosis / Q000382:microbiology / Q000473:pathology*