[Clinical and morphological considerations concerning "medulloepithelioma" (author's transl)].

The clinical course and autopsy findings in a 20 months old child with a so-called medulloepithelioma of the brain stem are reported. The histological features of this tumour are described. Ten previous cases in the literature are reviewed and the controversial problems of this entity are discussed. It seems reasonable to place this malignant tumour in the group of ependymomas; in detail, the definition "embryonic ependymoma"; proposed by Fowler, appears to be the most suitable, because it comprises all morphological and biological features of this rare malignant tumour.