肺過誤腫を合併した原発性肺癌の1例

Lung Cancer Associated with Hamartoma；Report of a Case

肺過誤腫は種々の間葉系組織を含む良性腫瘍で，肺良性腫瘍の中ではもっとも頻度が高く，まれに多発例や増大・悪性化傾向などが報告されている．われわれは，術前CTで肺内転移との鑑別を要した肺過誤腫合併肺癌の1例を経験したので，文献的考察を加えて報告する．

A 65-year-old male was admitted to our hospital for evaluation of an abnormal shadow in the left lung field of chest roentgenogram. A chest computed tomography scan revealed an ill-defined nodule in the superior lingular segment of left lung and a calcified nodule in the left pulmonary apex region. A diagnosis of lung adenocarcinoma in the left lingular was made by transbronchial cytology and the left upper lobectomy with lymph node dissection was performed. Pathological diagnosis was primary lung adenocarcinoma in the superior lingular segment of left lung （pT1aN0M0, stageⅠA） and hamartoma in the left pulmonary apex region. It was considered to be important to discriminate a hamartoma from a metastasic lesion in order to conduct correct treatment.