[Glioma of the chiasm (author's transl)].

The diagnosis of glioma of the chiasm is based on the following factors: occurrence in infancy, association with Von Recklinghausen's disease, progressive and slow loss of vision in both eyes, bilateral optic atrophy, unilateral temporal defect or asymmetrical bitemporal hemianopia, exophthalmos, slow course, omega-deformation of the sella turcica, enlargement of one or both optic foramina, postitive computerized axial tomography. Surgery is contraindicated. Radiotherapy may be applied, but its efficacy is still discussed.