CT is a valuable method in determining number, location and extent of lesions, although a definite diagnosis is often not possible on CT. In intracranial tuberculosis, CT was helpful in the diagnosis, assessing the degree of hydrocephalus and evaluating the effectiveness of antituberculous trerapy. Twenty-one cases of clinically proven intracranial tuberculosis were studied by CT in our hospital during last 3 years. Of them, eighteen cases were tuberculous meningitis and the rests were tuberculoma. The results were as follows : 1. Tuberculous menigitis presented three patterns of CT findings according to its disease process. a. In early stage of disease, suspcious multiple siodense small nodules in the cerebral and cerebellar hemispheres showed dense enhancement in postcontrast scan representing miliary tubercles. b. In later stage of the disease, precontrast scan showed partial or total obli eration of the basal and sylvian cisterns with mild dilatation of ventricular system. Postcontrast scan showed dense enhancement of basal and sylvian cisterns. This type of finding was the most common in our series. c. Moderate to marked dilatation of ventricle with or without a cluster of calcification in suprsella area on precontrast scan was seen in far later stage or as a sequllate of the disease. No enhancement was noted in postcontrast study. 2. Tuberculoma showed an isodense or slightly hyperdense area in the cerebral or cerebellar hemisphere with associated minimal edema in precontrast study. Postcontrast scan showed a small ring enhancement with central lucent area.