Patients (17) with the clinical diagnosis of benign intracranial hypertension (pseudomotor cerebri) were reviewed. All these patients underwent CT [computed tomography] scans of the head which were interpreted as normal. Comparison of mean ventricular size with that of a group of control subjects showed no significant difference. There may be almost no instances in which invasive neuroradiological procedures would be required to confirm the diagnosis of pseudotumor cerebri.