as a general principle , chronic alterations in axonal transport from any cause seem to produce aggregates of swollen nerve fibers which impart a yellow-white appearance to the disc tissue , and account for the yellow filled-in appearance of the disc in patients with drusen , chronic atrophic papilledema and melanocytomas and , in part , for the `` '' waxy yellow '' '' appearance of the disc in retinitis pigmentosa .
C0040300
tissue
C0334431
melanocytomas