The computer tomograms of the brain were investigated in 195 patients in whom a primary carcinoma was known to be present. Metastases of bronchial and mammary carcinomas are most frequent. It is not possible to achieve a definite differentiation of brain metastases from known primary tumors. References 1. Kazner, E. , Wende, S. , Grumme, Th. , Lanksch, W. , Stochdorph, 0. : Computertomographie intrakranieller Tumoren. Berlin, Heidelberg, New York: Springer 1981 2. Nadjmi, M. , Piepgras, U. , Vogelsang, H. : Kranielle Computertomo- graphie. Stuttgart: Thieme 1981 3. Penzholz, H. : Die...