転移性肺腫瘍と鑑別を要した肺原発胎児型腺癌の1例

Pulmonary Fetal Adenocarcinoma Requiring Differential Diagnosis of Metastatic Lung Tumor；Report of a Case

はじめに　胎児型腺癌は，胎児期の気道上皮に類似した腺管構造を特徴とするまれな腫瘍で，全肺癌の約0.1％と報告されている1）．われわれは転移性肺腫瘍と鑑別を要した肺原発胎児型腺癌の1例を経験したので報告する．

Fetal adenocarcinoma is a rare disease. We report a case of fetal adenocarcinoma requiring differential diagnosis of metastatic lung tumor. A 75-year-old woman was pointed out a 8 mm tumor in the right lower lobe by chest computed tomography （CT） 6 month ago. Because the size of the tumor had been increasing for 6 months, she was hospitalized for surgery. Because of the tumor shape, we suspected that the tumor was metastatic lung tumor of hepatocellular carcinoma for which she had undergone hepatic arterial infusion chemotherapy and radiofrequency ablation. A right lower lobectomy with lymph node dissection was performed and pathological diagnosis was high-grade fetal adenocarcinoma, stage Ⅳ.