A tumor-like condition of the optic nerve head of unknown etiology was found in a domestic pig. Clinical and histological manifestations suggest that the unusual tumor-like condition is probably a variant of proliferative optic neuropathy caused by unknown nonspecific damage (perhaps trauma), which was received earlier.
Keywords: Bergmeister’s papilla; exudative optic neuritis; ischemic optic neuropathy; optic nerve; proliferative optic neuropathy; traumatic optic neuropathy.