Migratory osteolysis.

Migratory osteolysis is a recently recognized syndrome characterized by a migratory articular pain pattern of the lower extremities and associated radiographically with localized and reversible juxta-articular osteoporosis. Serial bone scans, both dynamic and static, appear to offer a new and more sensitive means for diagnosing and monitoring of this condition. The dynamic studies suggest that augmented osseous blood flow is responsible, at least in part, for increased radioactivity in clinically involved areas and presumably is mediating the osteoporotic process.