重複大動脈弓を合併した右中葉肺癌の1例

Right Middle Lung Cancer with Double Aortic Arch：Report of a Case

はじめに　重複大動脈弓は血管輪を形成する大動脈弓の発生学的異常であり，重複大動脈弓を伴う肺癌切除例はまれである．われわれは，重複大動脈弓を合併した右中葉肺癌の1手術例を経験したので報告する．

Double aortic arch is an embryological abnormality of the aortic arch forming a vascular ring. It has been noted that the right recurrent nerve travels differently in patients with a duplicated aortic arch and may be in close proximity to the area of superior mediastinal lymph node dissection in lung cancer. We report a surgical case of a patient with right middle lung cancer associated with a duplicated aortic arch. A 64-year-old man was referred to our hospital because of a nodular shadow in the right lung field noted on chest X-ray during a medical checkup. A transbronchial needle biopsy revealed a diagnosis of adenocarcinoma, and right middle lobe resection and lymph node dissection were performed. When dissecting the superior mediastinal lymph nodes in a patient with an overlapping aortic arch, it was necessary to carefully perform the operation, paying attention to the running of the right recurrent nerve.