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要旨
患者は71歳,男性.発熱,呼吸困難を主訴とした肺炎の加療のため入院となった.胸部X線写真では右中下肺野の浸潤影を認めた.入院後も誤嚥性肺炎の反復と意識レベルや血圧の低下傾向を認めたが,頭部MRI や髄液所見は正常であった.低Na血症や低血糖傾向が認められたため内分泌学疾患の検索を行い,血中ACTH,コルチゾール,尿中17-KSの著明な低値を認め,ACTH負荷試験などによる精査の結果ACTH単独欠損症と診断した.本例は副腎皮質ホルモン剤の補充療法により速やかに回復した.以上より,本例はACTH単独欠損症による副腎機能不全と,それによる意識レベルや嚥下能力の低下が誤嚥の反復に関与していたものと考えられた.
Summary
A 71-year-old man was admitted to Yame General Hospital for treatment of pneumonia with high fever and dyspnea. Chest X-ray demonstrated opacity in the right middle and lower lobe. After hospital admission, he had reiterative aspiration pneumonia accompanied with hypoxia, mental disturbance, and hypotension. The brain MRI and cerebrospinal fluid findings were normal. He had hyponatremia and hypoglycemia, and his levels of serum ACTH, serum cortisol, and urinal 17-KS were under normal range. The results of other studies (e.g. ACHT tolerance tests) were compatible with a diagnosis of isolated ACTH deficiency. He rapidly recovered under oral administration of hydrocortisone. We concluded that his reiterative aspiration pneumonia was caused by isolated ACTH deficiency.
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