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. Author manuscript; available in PMC: 2015 Jul 1.
Published in final edited form as: Osteoarthritis Cartilage. 2014 May 10;22(7):980–985. doi: 10.1016/j.joca.2014.04.027

Figure 4.

Figure 4

A & C are examples of disc spaces on radiographs of separate rhesus monkeys and B & D show the same disc spaces via histology. B shows a cluster of sclerotic depressions (SD) at the center of the endplate. D on the other hand, shows a bridged osteophyte (OST) that is visible via radiograph, but could promote a “healthier” radiographic assessment of disc space narrowing because it holds the disc space apart – while via histology we see that the disc is degenerated. Histology sections in figure are stained with Mallory-Heidenhain.