Induction concurrent chemoradiotherapy compared with induction radiotherapy for superior sulcus non‐small cell lung cancer: a retrospective study

Abstract

To evaluate the efficacy of current chemoradiotherapy on improvement of survival in patients with superior sulcus non-small cell lung cancer (NSCLC). We retrospectively reviewed the data of 39 patients with superior sulcus NSCLC treated with induction therapy followed surgery. The patients were divided into two groups according to the induction approach: the induction radiotherapy (RT) group (1993-1999), and the induction chemoradiotherapy (CT/RT) group (since 1999). The rate of complete resection was 65 percent in the RT group (n = 17) compared with 91 percent in the CT/RT group (n = 22, P = 0.024). Complete pathological responses from induction therapy were 12 percent in the RT group and 45 percent in the CT/RT group (P = 0.032). Overall survival (OS) was significantly longer in patients who received CT/RT than that in those who received RT, with 2- and 5-year survival rates of 77.3 percent and 36.4 percent versus 41.2 percent and 11.8 percent, respectively (P = 0.007). CT/RT also associated with a markedly longer tumor-free survival (TFS), with a median TFS of 40 and 17 months, respectively (P = 0.007). Patients achieved complete resection or complete pathological response had a significantly better survival than those with incomplete resection or pathological partial responses and no change (P < 0.0005 and P = 0.001, respectively). Our results indicate that CT/RT followed by surgery can significantly improve OS and TFS, and may be considered as an optimal option in treatment of patients with superior sulcus NSCLC.