[The Aulhorn flicker test. I: Concomitant neuritis in malignant non-Hodgkin's lymphoma and leukodystrophy]

Cases of optic nerve involvement in malignant non-Hodgkin lymphoma and multifocal progressive leukodystrophy are reported. In both patients an optic neuropathy was diagnosed secondary to infiltration of the optic nerve and the Aulhorn flicker test was positive. Pathological and neurophysiological conditions which yield a positive flicker test are discussed in the light of these findings.