The<unk>  is progressive and slowly worsens with time, although people may remain minimally symptomatic. Treatment is aimed at controlling symptoms, but there is no cure. Any<unk>  or<unk> s can be affected, but<unk> 's<unk>  occurs most frequently in the spine, skull, pelvis, femur, and lower legs. Osteogenic sarcoma, a form of<unk>  cancer, is a rare complication of<unk> 's<unk>  occurring in less than one percent of those affected. The development of osteosarcoma may be suggested by the sudden onset or worsening pain.
Paget's disease of bone
Diffuse idiopathic skeletal hyperostosis
Albright's hereditary osteodystrophy
Giant-cell tumor of bone
Fibrous dysplasia of bone
Tumoral calcinosis
Metabolic bone disease
Oncogenic osteomalacia