[Fundaments for a classification of CNS tumours (author's transl)]

A general effective classification of tumours of the central nervous system hats to be based on morphologic criteria of tissues. The cells are subordinated to the structure of the tissues. A simple classification according to morphologic structures is not quite satisfying, because each system of tumour types should permit to determine the diagnosis, the prognosis, the therapy, and the aetiology. In each classification of tumours the character of tissue and the biological behaviour should be considered only in mutual relationship. But this does not mean that in tumours of the central nervous system the degree of differentiation and the biological behaviour must agree.