[Atypical symptoms and their pathogenesis in extrapyramidal tumors].

In 124 patients with extramedullary tumors of different histological structure atypical syndromes were detected in 61% and were verified by surgical methods. The following atypical syndromes were marked: a nonconformity of the level of sensorial conductivity and the level of the tumor (19%), a dissociated type of spasticity of a cervico-thoracal localization (17%), disorder of cranial innervation (23.4%), swelling of the optic papilla (2.4%), etc. The pathogenesis of these changes was most frequently conditioned by hemo- and liquor dynamical disturbances, as well as by intoxication. Diagnostical errors related to the character of the process were seen in 18.5%, topico-diagnostical discrepance--in 19.3%.