最新临床试验：立体定向或强度调制放射治疗Ⅱa-b期前列腺癌

这是经美国国家癌症研究所批准的一项多中心随机对照III期临床试验，目的是研究立体定向全身放射治疗与强度调制放射治疗在治疗IIA-B期前列腺癌患者中的效果。放射治疗使用高能x射线杀死肿瘤细胞和缩小肿瘤。立体定向全身放射治疗使用特殊设备定位病人，并以高精度向肿瘤输送辐射。这种方法可以在较短的时间内用较少的辐射剂量杀死肿瘤细胞，对正常组织造成较少的损伤。立体定向全身放射治疗对前列腺癌的疗效可能更好。

该临床试验正在全美180家医院进行开展。

This randomized phase III trial studies how well stereotactic body radiation therapy works compared to intensity-modulated radiation therapy in treating patients with stage IIA-B prostate cancer. Radiation therapy uses high energy x-rays to kill tumor cells and shrink tumors. Stereotactic body radiation therapy uses special equipment to position a patient and deliver radiation to tumors with high precision. This method can kill tumor cells with fewer doses over a shorter period and cause less damage to normal tissue. Stereotactic body radiation therapy may work better in treating patients with prostate cancer.