Fig 4. Elastic fiber stains in G1 and G2 lumbar discs.
The presence of elastic fibers was more related to group (age) than to degeneration grade; even Th4-5 G1 specimens had prominent fibers in the AF while mildly-degenerated G2 discs (Th2) uniformly lacked them. The single G2 specimen is shown with few elastic fibers in the pAF (arrows). V, Verhoeff; W, Weigert; Th1-5, Thompson grade.