In 1977, more than 2,000 patients were examined in our department of neuroradiology by means of angiography, computed tomography, and in some cases also by pneumoencephalography. The value of the various neuroradiological examinations is discussed taking as an example two patients suffering from intracranial space-occupying processes of different etiologies. Consequently, the differential diagnostic problems occurring are discussed casuistically. It is demonstrated that correct diagnosis can often be achieved only by use of all the results of the different neuroradiological methods, together with precise knowledge of the course and the clinical symptoms.