[A case report of small-sized peripheral lung cancer diagnosed by thoracoscopic biopsy].

A case who had surgical treatment for small-sized peripheral lung cancer diagnosed by thoracoscopic biopsy was reported. A 66-year-old female was admitted to our hospital because of evaluation of an abnormal shadow on chest X-ray. Chest CT showed that the tumor about 7 mm in diameter was situated in right S1b and suspected to be malignant. Transbronchial lung biopsy and brushing showed no malignancy. The tumor was finally diagnosed to be well-differentiated adenocarcinoma by thoracoscopic lung biopsy. Following this procedure, right upper lobectomy and lymph node dissection (R2a) were performed through postero-lateral thoracotomy at one stage. Pathological diagnosis showed that the tumor was well-differentiated papillary adenocarcinoma and pathological TNM classification was T1N0M0. The postoperative course was uneventful and the patient is now doing well with no relapse at 1 year 2 months after the operation.