F Henschke, H J Pesch, W Wunder
In two healthy and two diseased whitefish (Coregonus Wartmanni) taken from Lake Constance (FRG), ankylosis of the vertebral column was investigated both roentgenologically and histologically. Subsequent to the collapse and necrosis of the "residual" spinal cord within the intervertebral spaces, the outside edges of the vertebral bodies come into direct contact. The compression and tensile forces that occur to an increased extent as a result of the instability, lead not only to a remodelling of the vertebral bodies, but also to the formation of spondylotic osteophytes at the edges of the vertebrae and, as a result of periosteal stimulation, to the development of cellular hyaline cartilage, which fills the intervertebral spaces...
1982: Pathology, Research and Practice