Locally recurrent central-type early stage lung cancer < 1.0 cm in diameter after complete remission by photodynamic therapy.

Background: It is well known that central-type early stage lung cancer Patients and methods: Ninety-three patients with 114 lesions were followed up, and cases of recurrence after CR has been obtained with initial tumors that had a diameter Results: The CR and 5-year survival rates of patients with lesions Conclusions: To reduce the recurrence rate, it is essential to accurately grasp the tumor extent and the depth of the bronchogenic carcinoma before performing PDT. Analysis of cell features of recurrent lesions after CR appears to be a useful source of information as to the depth of cancer invasion in the bronchial wall.