Case 44-1992

Presentation of Case A 60-year-old man was admitted to the hospital because of chronic diarrhea and increasing weakness. The patient was in stable health until eight months earlier, when diarrhea developed while he was working in Mexico. A test for antibodies to human immunodeficiency virus (HIV) type 1 was positive. He returned to this country. Seven and a half months before entry he noticed weakness of the right leg and clumsiness of the right arm. One month later he came to this hospital, where physical examination revealed spastic paresis of the right leg. A cranial computed tomographic (CT) scan showed . . .