So observes Liu Jung-sen, attending surgeon in thoracic surgery at Cathay General Hospital, noting that adenocarcinomas grow at the outer reaches the lung. This cancer has no initial symptoms, and by the time it invades the nerves, blood vessels, or bronchial tubes, and symptoms appear such as coughing, chest pain, breathing difficulties, or coughing up blood, the disease has often reached the third stage.
「癌期影響預後，」國泰醫院胸腔外科醫師劉榮森指出，肺腺癌多長在肺的周邊，初期沒有症狀，等到侵犯到神經、血管、氣管，出現咳嗽、胸痛、呼吸困難、咳血等症狀時，往往已經是第三期。