Abstract: Objective To analyze the feature of electronic bronchoscope on elderly patient with lung cancer, and to investigate the correlation among the histopathologic type of lung cancer, gender and the feature under bronchoscope.Methods320 patients with lung cancer older than 65 years were observed with electronic bronchoscope.ResultsAmong the 320 patients, cases of the central bronchogenic and the peripheral were 199 (62.2%) and 121 (37.8%) respectively. The most common histopathologic type was squamous cell cancer which had totally 176 (55.0%) cases. The percentage of adenocarcinoma and small cell lung cancer was 25.0% and 16.6% respectively. Under electronic bronchoscope, the cases of proliferation type were 162 (50.1%), mixed type 85 (26.6%), infiltration type 66 (20.1%) and outside oppression type 7 (2.2%). Among the patients with squamous cell cancer, male was significantly more than female (P=0.0000). While among the adenocarcinoma and small cell lung cancer, female was significantly more than male (P=0.0476 and P=0.0245 respectively). The feature under the electronic bronchoscope was significantly related to histopathologic type (P=0.0000). Among the cases of squamous cell cancer and small cell lung cancer, the cases of central bronchogenic cancer were significantly more than that of peripheral cancer (P=0.0476 and P=0.0245 respectively). Among the cases with adenocarcinoma, the cases of peripheral cancer were significantly more than that of central bronchogenic cancer (P=0.0000).ConclusionsCentral bronchogenic cancer, squamous cell cancer and adenocarcinoma are the common types among the elderly patients with lung cancer, and proliferation is the most common feature under bronchoscope. Electronic bronchoscope play an important role in diagnosis of lung cancer, for it is simple to operate and is well to be tolerated.

Key words: Lung cancer, Electronic bronchoscope, Elder