Early changes of<unk>  can be detected by x-ray. In this radiograph there is dissolution and fragmentation of the bone in several of the terminal phalanges.~CDC<unk>  is resorption of the distal bony phalanges.<unk>  has two patterns of resorption in adults: diffuse and bandlike. The diffuse pattern of resorption has a widely diverse differential diagnosis which includes: pyknodysostosis, collagen vascular disease and vasculitis, Raynaud's neuropathy, trauma, epidermolysis bullosa, psoriasis, frostbite, sarcoidosis, hypertrophic osteoarthropathy, acromegaly, and advanced leprosy. The bandlike pattern of resorption may be seen with polyvinyl chloride exposure and Hadju-Cheney syndrome. A mnemonic commonly used for<unk>  is PINCHFO. Pyknodysostosis, Psoriasis, Injury (thermal burn, frostbite), Neuropathy (diabetes), Collagen vascular disease (scleroderma, Raynaud's), Hyperparathyroidism, Familial (Hadju-Cheney, progeria), Occupational (polyvinyl exposure),<unk>  may be associated with minimal skin changes or with ischemic skin lesions that may result in digital necrosis.
Acroosteolysis
Osteoradionecrosis
Malunion
Osteomyelitis
Bunion
Osteolysis
Myelonecrosis
Osteochondrosis