Significance of renal visualization during bone scanning in Paget's disease

In 17 of 26 patients with extensive, symptomatic Paget's disease poor renal visualization was noted on bone scanning with 99mTc-diphosphonate. Renal function was normal in all patients. The intensity of the renal image proved to be inversely related to the extent and metabolic activity of the Pagetic process. This finding supports the hypothesis that in Paget's disease the balance between skeletal and renal extraction of circulating tracer amy be displaced in favor of the former.