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患者は62歳,男性.発熱,咳嗽を主訴として当院に入院した.胸部X線写真,胸部CTより,右中間幹の腫瘍影とともに右肺門リンパ節の腫脹および右下葉の閉塞性肺炎を見,気管支鏡にて肺扁平上皮癌の診断を得た.画像診断上,腫大した右肺門リンパ節は左房と接し,同部への直接浸潤が疑われ,経食道超音波断層法を施行した.超音波所見より左房への直接浸潤は否定され,またカラードプラ法により腫大したリンパ節内に,高速度(1m/sec)の血流を認め,術後の病理組織学的検討により同血管は腫瘍血管(気管支動脈)と確認された.今後,肺癌による腫大リンパ節の組織性状の判定に同法が有用である可能性が示唆された.
A 63 year-old male with primary lung cancer, was examined by transesophageal color Doppler echogra-phy (TEE). TEE revealed metastatic lymph node adjacent to the root of the right pulmonary vein. Direct invasion to the left atrium was neglected because of the finding that the left atrial wall was fluctuating acording to cardiac movements. TEE also visualized a tumor vessel in which peak velocity of the flow was high, 1m/ sec. The resected specimen showed that the tumor vessel had originated from the bronchial artery in the metastatic lymphnode.
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