[Diagnostic difficulties in cases of opticochiasmatic arachnoiditis].

Clinical signs and the methods of radiological diagnosis in optochiasmatic arachnoiditis are discussed. Difficulties in the interpretation of results of examinations may stem from the physiological fluctuations of the size and the form of the region and the situation of the chiasma and also from an insufficient precision of orientation of the tomographical cross-section. In spite of coordination of the angiography of carotis artery, of pneumocysternoencephalography and computer tomography one may receive faulty negative results. Presentation by means of a magnetic resonance seems to open quite new perspectives.