ABSTRACT
There is a large variety of other STSs that are collectively categorized as nonrhabdomyosarcoma (NRMS) . The NRMSs are named according to the normal mesenchymal tissue component of the tumor, for example, fat cells in liposarcoma and cartilage in chondrosarcoma . Approximately 75% of STSs in the 10-to 19-year age group are NRMS . Depending on tumor grade and size, NRMS may be treated with a postoperative dose of 55 .8 Gy or 45 Gy preoperatively with a 10 .8 to 19 .8 Gy postoperative boost for positive margins . A current Intergroup Rhabdomyosarcoma Study Group (IRSG) trial is assessing whether selected tumors will be as well controlled with lower radiation doses . Survival rates for NRMS are generally somewhat higher than for RMS (Ries 1999) . Spunt et al . (2008) and Ferrari (2005) gave good overviews of NRMS .
