The study, carried out in 286 patients with extensive SCLC who had responded to systemic chemotherapy, compared prophylactic cranial irradiation with no further therapy.

• 这项研究纳入286例对全身化疗有反应的广泛转移小细胞肺癌患者，来比较预防性全脑放疗和无其他进一步治疗的结果。