[Tumors of the 4th ventricle and the craniospinal transitional zone in the computer tomogram].

Among 5000 computer-tomographic examinations of the brain, there were only 82 tumours located in the 4th ventricle and spinal space. The method is of value for the indication of the localisation and extension of the tumours. The relation of tumours to the rhomboid fossa cannot always be clearly recognised. In spite of good indications in case of some tumours, this method cannot replace the histological method. It contributed only little to the early diagnosis in the series of examinations; the majority of the tumours had a volume of 30 ml. This is due to the fact that characteristic clinical symptoms occur late.