To evaluate the clinical therapeutic effect of limited bronchus granuloma caused by foreign body with medication in trachea, 6F tube was put in sick trachea under fibrobronchoscopy in 26 patients with bronchus granuloma due to foreign body, and 5ml of 2% lidocaine + 10ml of sterile Saline + 5mg dexamethasone +antibiotics (Amikacin0 2g or ceftriazone1 0g) were injected into sick trachea through 6F tube twice a day. 25 were cured, the cure rate was 96 2%,and the other one had to be operated; the course was 6～15d. Other 29 patients were treated with routine antibiotics intravenation+aerosol inhalation or medication in trachea under fibrobronchoscopy every other day, and 24 were cured, the cure rate was 82 8%; the other 5 had to be operated, the course was 6～32d. It is suggested that the former method has good effect in local anti inflammation, and can decrease the intravenous antibiotics dosage and side effect.

To study the clinical feature of pulmonary tuberculosis with sputum M. tuberculosis negative and L form of M. tuberculosis positive, the sputum of 204 patients with pulmonary tuberculosis with negative smear and culture results was cultured for L form of M. tuberculosis. A comparative study of major clinical manifestations, X ray, and therapeutic effect was carried out in 60 cases of L form positive and 144 cases of L form negative pulmonary tuberculosis. The detection rate of L form positive in patients with pulmonary tuberculosis was 29 4%. The incidence of caseous lesion and cavitation in the L form positive patients was higher than those with L form negative, and the incidence of focal absorption was higher in L form negative patients than those with L form positive. The existence of L form of M. tuberculosis suggested activity of the tuberculous lesion. The treatment of pulmonary tuberculosis must be persisted with a reasonable regimen with whole therapeutic period until L form of M. tuberculosis is eliminated from sputum.