J. Jpn. Bronchoesophagol. Soc., 73 : 251─257, 2022Thyroid cancer sometimes invades the trachea, and in each case the appropriate airway man-agement must be conducted. Here we report the case of a 65-year-old man with poorly differenti-ated thyroid cancer invading the trachea, covering the anterior neck broadly. As it seemed ex-tremely difficult to intubate endotracheally or perform a tracheotomy, we decided to initiate V-A ECMO (veno-arterial extracorporeal membrane oxygenation) to support systemic oxygenation without intubation and tracheotomy. After introducing ECMO, we managed to perform the tra-cheotomy. After confirming that the oxygen concentration in the blood was sufficient, the patient was weaned off ECMO, after which a total thyroidectomy and laryngectomy were performed. In cases where intubation or tracheotomy seems difficult, we should consider using ECMO when tra-cheal stenosis is likely to occur from a malignant tumor, or when the minimum tracheal diameter is under 50% of normal. Our case corresponded to both conditions, and we were able to save his life with V-A ECMO. Although most otolaryngologists may not be familiar with ECMO, it seems very important to understand the characteristics of ECMO for coordinating treatment with anes-thesiologists, intensivists, and cardiovascular surgeons.Key words : thyroid cancer, ECMO, PCPS, tracheal invasion, airway management日気食会報，73（3），2022A Case Report2571）Department of Otolaryngology-Head & Neck Surgery, National Defense Medical College, SaitamaV-A ECMO Assisted Airway Management of a Patient with Poorly Differentiated Thyroid Cancer Invading the Trachea： Hiroya Yonaga, M.D.1）, Kosuke Uno, M.D., Ph.D.1）, Shotaro Hirokawa, M.D.1）, Koji Araki, M.D., Ph.D.1）, and Akihiro Shiotani, M.D., Ph.D.1）
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