Unusual bone images in hyperparathyroidism.

Whole-body scans with 99Tcm-Sn polyphosphate were performed on four patients suffering from hyperparathyroidism. Two of the patients were investigated twice, at intervals of five and eight months. A variety of unusual but symmetrical images were obtained, not always confined to the skeleton. It is suggested that in conditions of renal failure the radiopharmaceutical may be avidly accumulated on first passage by calcifying areas in the soft tissues. Deteriorating blood supply to the bones reduces uptake of 99Tcm in the the skeleton.