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Spinal cord injury: effect of thyrocalcitonin on periarticular bone formation in three subjects.

Sodium fluoride 18F scintimetry was performed before and after 1 month of salmon thyrocalcitonin treatment of 3 spinal cord injured patients with periarticular ossification of the hips and knees. Thyrocalcitonin therapy caused a marked diminution of 18F uptake in 1 patient with long-standing periarticular bone of both hips. Clinically, the range of motion in this subject increased by 25 degrees and there was a marked decrease in pain locally. The results were, however, not duplicated in the 2 patients with periarticular bone formation of short duration.