Treatment outcomes of tuberculosis in patients with lung cancer: a retrospective analysis
Abstract Background Lung tuberculosis (TB) and cancer have a complex relationship. Data concerning TB treatment in lung cancer patients are still incomplete. The aim of this study was to investigate the clinical characteristics and treatment responses of lung tuberculosis in lung cancer patients. Methods In a retrospective cohort study, lung cancer patients with tuberculosis were identified between January 2013 and December 2016. These patients were divided into a TB treatment group and a TB nontreatment group. Age- and sex-matched lung cancer patients without tuberculosis were selected as control subjects. The clinical courses and responses of patients with and without tuberculosis were examined and compared. Results A total of 98 consecutive lung cancer patients were diagnosed with lung tuberculosis (47 patients in the TB treatment group and 51 patients in the TB nontreatment group). Fifty-one lung cancer patients without TB were enrolled as control subjects. Most patients in the three groups were elderly, had advanced non-small cell lung cancer and had tumor burdens. Compared with patients in the TB nontreatment group, the patients in the TB treatment group had more active TB (66% vs. 5.9%, p < 0.001) and were newly diagnosed (55.3% vs. 23.5%, p < 0.001). The anti-cancer chemotherapy response rate in the TB nontreatment group was not different from that in the TB treatment group (58.8% vs. 76.6%, p = 0.061), but it was significantly lower than that in the lung cancer group (58.8% vs. 88.2%, p < 0.001). The median survival times of patients in the TB treatment group, TB nontreatment group and cancer patients (control group) were not different (56, 55 and 58 weeks, respectively). No significant differences in serious side effects of chemotherapy were observed among the three groups. Conclusion Both anticancer and antituberculosis treatments can be safely and effectively administered in lung cancer patients with tuberculosis. Attention should be paid to the risk of tuberculosis in lung cancer patients in tuberculosis high-burden countries.