Laboratory investigation showed a hematocrit of 40% (reference range, 41%-65%), a platelet count of 42 000/μL (reference range, 150 000-450 000/μL), and a leukocyte count of 16 300/μL (reference range, 9400-34 000/μL) with 12% polymorphonuclear cells, 73% lymphocytes, and 9% monocytes. The prothrombin time was greater than 2 minutes (reference range, 12-23.5 seconds), and the partial thromboplastin time was 119 seconds (reference range, 35-52 seconds). The aspartate aminotransferase level was 338 IU/L (reference range, 14-70 IU/L; to convert to microkatals per liter, multiply by 0.0167); the alanine aminotransferase level was 52 IU/L (reference range, < 54 IU/L; to convert to microkatals per liter, multiply by 0.0167). The total and direct bilirubin levels were 3.9 mg/dL and 2.1 mg/dL, respectively (reference ranges, 2-6 mg/dL and < 0.5 mg/dL, respectively; to convert to micromoles per liter, multiply by 17.104). Head ultrasonography demonstrated bilateral calcification of the thalamic vessels (Figure 3) and right-sided intraparenchymal and intraventricular hemorrhage.