Radionuclide scanning in children with rhabdomyosarcoma.

Radionuclide scintigraphy was performed in 46 children with rhabdomyosarcoma. Of the 63 radiologically confirmed sites of bone disease, 76% were detected by 99mTc-labeled phosphate uptake. All 15 sites of hepatic involvement and eight of the nine cranial sites of disease exhibited isotope accumulation. Gallium 67 scans showed 57% of the 43 proven sites of disease, including four previously unsuspected areas. Twelve false-positive sites were obtained with gallium. Radionuclide scanning is a valuable aid in the diagnostic evaluation and management of childhood rhabdomyosarcoma.