Three normotensive patients presented with seizures and CT showed an intracerebral hematoma. Although these patients had no more seizures and developed no other neurological deficit, repeat CT scans (performed 2 to 3 weeks later) showed hematoma enlargement. Angiogram was performed in 2 cases and showed no evidence of vascular malformation or neoplasm. Six weeks to 6 months later, CT showed that the hematoma had changed from a hyperdense to an isodense appearance and in two cases slight enhancement occurred. During a follow-up interval of 6 to 24 months, no other neurological episodes have occurred. The etiology of the chronic expanding intracerebral hematomas was not delineated in these 3 patients.