Which of the following arthritides is radiographically marked by ossification of the anterior longitudinal ligament with relative maintenance of intervertebral disc height, absence of posterior joint fusion, and lack of sacroiliac joint involvement?

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The radiographic findings described are characteristic of diffuse idiopathic skeletal hyperostosis (DISH). Ankylosing spondylitis typically involves posterior joint fusion and sacroiliac joint involvement, while psoriatic spondylosis may show erosions and ankylosis of the spine and sacroiliac joints. Neuropathic arthropathy is marked by degeneration of the joint due to nerve damage, and may show joint destruction rather than ossification of ligaments.

Which of the Following Arthritides Is Radiographically Marked by Ossification