Abstract
We experienced 4 cases of lung cancer whose chest roentgenogram was negative. In the same period, 251 cases of lung cancer were treated surgically in our Department of Thoracic Surgery and only 4 cases (1.6%) were chest X-P negative cancer.
The cases were male, heavy smokers, cancer age over 40 and were admitted to our hospital with hemoptysis. Sputum cytology in all patients showed class V squamous carcinoma cell and the tumors were found in the lobar bronchus (3 cases) and upper division bronchus (1 case) by flexible bronchoscopy.
These tumors included 2 cases of superficial infiltrating type, one case of nodular infiltrating type and one case of polypoid type, and all were early stage central type lung cancer.
The surgical procedures were bilobectomy in 2 cases, lobectomy in one case and lobectomy with sleeve resection in one case. Sleeve resection is a useful surgical procedure for such cases.
