[Carcinomas and malignant papillomas of choroid plexus (author's transl)].

Carcinomas and malignant papillomas of choroid plexus occur more frequently in children and are mostly localized in lateral ventricles. Their clinical picture corresponds to that of plexus papillomas. The histological diagnosis is based upon unmistakeable criteria of malignancy in a tumour deriving from choroid plexus. Five such cases have been studied; in three of them the increase of malignancy was proved by the investigation of recurrences. One case was investigated electronmicroscopically.