In 1972, the Intergroup Rhabdomyosarcoma Study ( now called IRSG) was established to increase knowledge and to improve therapeutic results for rhabdomyosarcoma from all locations. 1972年成立国际横纹肌肉瘤协作研究组(theIntergroupRhabdomyosarcomaStudy(nowcalledIRSG))来研究和治疗各地的横纹肌肉瘤患者。