Case report 697: Neuropathic arthropathy of the shoulder with no identified cause.

Two cases of neuropathic disease of the shoulder without evidence of a neurological disorder are described. The absence of any neurological disorder led to the cases being initially mistaken for primary neoplasms of bone, lending support to the vascular theory of pathogenesis of this lesion. Careful attention to the radiographic features and knowledge that a neurological disorder need not be present should lead to the correct diagnosis.