Pathologic fractures associated with idiopathic amyloidosis of bone in chronic hemodialysis patients.

Amyloid bone lesions were found in 2 chronic hemodialysis patients presenting with pathologic hip fractures. These amyloid deposits were noted as lytic defects on plain skeletal radiographs. No evidence for disseminated amyloidosis was discovered on physical examination, skin biopsy, or bone marrow biopsy. Myeloma, other plasma cell dyscrasia, and preceding chronic inflammatory states were not found in either patient. The amyloid deposits had staining characteristics suggestive of secondary amyloid based on the potassium permanganate reaction. Isolated amyloid bone deposits should be included in the differential diagnosis of lytic bone lesions or pathologic fractures in chronic dialysis patients.