Clinical research of three dimensional conformal radiation therapy combined with EP regimen for limited-stage of small cell lung cancer in elderly / 中国医师进修杂志

ABSTRACT

Objective To investigate the clinical effect of three dimensional conformal radiation therapy combined with EP regimen for limited-stage of small cell lung cancer in elderly.Methods A total of 83 elder patients with limited-stage of small cell lung cancer were divided into treatment group and control group by random digits table method.In treatment group,42 patients received three dimensional conformal radiation therapy with synchronized EP regimen chemotherapy.In control group,41 patients received 2 cycles of EP regimen chemotherapy in advance,then received three dimensional conformal radiation therapy.Results The complete remission rate and objective response rate of treatment group and control group had significant differences [45.2％ (19/42) vs.17.1％ (7/41),81.0％ (34/42) vs.51.2％ (21/41)] (P =0.006,0.004).Follow-up for 2 years,there were 2 patients lost in treatment group,there was 1 patient lost in control group.The 1,2 years survival rate of treatment group and control group had significant difference [87.5％(35/40) vs.60.0％(24/40),65.0％(26/40) vs.32.5％(13/40)](P =0.005,0.004).The incidence of leukopenia,anemia,radiation pneumonitis and radiation esophagitis in treatment group were higher than those in control group,but there were no significant differences (P＞ 0.05).The 2-year local recurrence rate and distant metastasis rate of treatment group and control group had significant differences [17.5％(7/40) vs.42.5％ (17/40),32.5％ (13/40) vs.62.5％ (25/40)] (P =0.015,0.007).Conclusions Three dimensional conformal radiation therapy combined with EP regimen for limited-stage of small cell lung cancer in elderly can improve the short-term efficacy,long-term survival and reduce the rate of local recurrence and distant metastasis.It is safe and effective in the treatment of limited-stage of small cell lung cancer in elderly.