[A resected case of adenosquamous-carcinoma of the lung]

A resected case of an adenosquamous carcinoma of lung diagnosed from sputum and trans-bronchial-aspiration cytology is reported. The patient, a 39-year-old woman, was identified by mass screening testing for pulmonary cancer. Sputum cytology and trans-bronchial-aspiration cytology conducted by means of a bronchofiberscope revealed the presence of both an adenocarcinoma and squamous carcinoma cells. A histologic examination of the resected lung revealed the adenosquamous carcinoma. This case is very rare in having been diagnosed before surgery, and by sputum cytology which was very available.