TRIPLE-PHASE BONE-SCAN FINDINGS IN AGGRESSIVE FIBROMATOSIS BEFORE ANDAFTER RADIATION-THERAPY

The authors present comparative triple-phase bone scan findings in thr ee cases of histologically proven aggressive fibromatosis both before (Initial evaluation) and after radiation therapy. The purpose of the s tudy was to compare triple-phase bone scan findings in aggressive fibr omatosis both before and after radiation therapy and to determine whet her any additional physiological information could be obtained. Before radiation therapy, the triple-phase bone scintigraphy demonstrated in creased flow and radiotracer pooling In the areas of tumors on dynamic flow and immediate blood pool images, respectively. However, the dela yed static images demonstrated variable radiotracer uptake. When compa red to preradiation therapy triple-phase bone scan, decreased vascular ity was well demonstrated in all three patients after radiation therap y. In addition, it also provided information regarding the changes in the size and extent of tumor, noninvaded underlying bone, and remainde r of the skeleton. This additional information can be particularly use ful in patients with equivocal or questionable histologic diagnosis es pecially from small, unrepresentative biopsies.