Purely productive (nonerosive) enthesopathic hyperostosis involving the pelvis, calcaneus, and patella is associated with which of the following conditions?

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Diffuse idiopathic skeletal hyperostosis (DISH) is characterized by nonerosive hyperostosis of entheses, particularly in the spine and pelvis, but can also involve other sites such as the calcaneus and patella. DISH is not typically associated with erosive joint changes or inflammatory arthropathy, making it a purely productive enthesopathy. Psoriatic arthritis (A) and enteropathic arthropathy (D) can both involve enthesitis, but are typically associated with erosive joint changes and inflammatory arthritis. Neuropathic arthropathy (C) is characterized by joint destruction due to nerve injury, and is not associated with enthesopathy.

Purely Productive (Nonerosive) Enthesopathic Hyperostosis Involving the Pelvis, Calcaneus, and Patella