Some info from Anapsid
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Acquired Skeletal Deformities
As a result of severe or prolonged
metabolic bone disease, many lizards end up with permanent deformities even after the MBD itself has been successfully resolved. With MBD, bones may actually break, or they may be bent by the force exerted on them by the pull of muscles attached to them. If broken bones are not properly set, or the bent bones heal quickly once proper calcium and environment is provided to the lizard, there may be left a residual lump or bump in the bone that broke and knitted crookedly or that remained bent during the period of time that missing calcium was restored to the bone (see photo of
Rugwort). When this happens along the spinal and tail vertebrae, bends and kinks may result.
Deformities may also be the result of traumatic accident. Adam Britton, a zoologist currently working for Wildlife Management International in Darwin, Australia, sent me a photo of a wild
blue-tongue skink he examined. The skink had sometime previous suffered a traumatic spinal injury, but despite the dramatic deformity that resulted from it, was flourishing and so returned to the wild.
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