It is reported a case of a previously healthy man with seizures of sudden onset. A contrast head computerized tomogram (CT) showed a right frontoparietal expanding lesion suggesting to be metastatic. No prior disease was found on investigation. The histologic exam of the brain revealed tuberculoma. The seizures were controlled with Hidantoin 300 mg/day and antituberculosis chemotherapy for 18 months. Central nervous system tuberculosis (5-15% of the extrapulmonary forms) is highly lethal. The case reported herein is specially rare in immunocompetent patients. It may have good prognosis and should be considered in the differential diagnosis of brain tumours.

Keywords: Intracranial tuberculomas. Central nervous system tuberculosis. Diagnosis.