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要旨●好酸球性食道炎(EoE)は,食道壁での好酸球性炎症による食道狭窄,機能不全から生じる疾患である.EoEはその診断・治療に臨床と病理の両方からのアプローチを必要とする疾患であり,特に内視鏡での生検が診断に欠かせない.しかし,臨床徴候がみられてもEoEに特徴的とされる内視鏡所見を認めない場合もあり,その際にはCTや超音波内視鏡検査(EUS)での食道壁肥厚が当疾患を疑うきっかけとなりうる.また,治療にて症状や内視鏡的生検での組織学的改善が得られても,粘膜下層や固有筋層の壁肥厚は残存している場合がある.壁肥厚が残存したまま治療を中止した際には再発が多いとの報告もあり,治療効果判定においてもCTやEUSによる食道壁全体の把握が必要である.
EoE(eosinophilic esophagitis)is a disease resulting from esophageal stricture and dysfunction owing to eosinophilic inflammation on the esophageal wall. EoE is diagnosed through clinical and pathological approaches, especially endoscopic biopsy. However, some cases lack specific endoscopic findings for EoE in spite of the presented symptoms. In those cases, thickening of the esophageal wall may be recognized on CT and EUS(endoscopic ultrasonography). In addition, even if steroid treatment is successful in symptomatic or histological improvement, thickening of the submucosal wall and muscular layer may remain. Some previous reports suggested that EoE would relapse when treatment was stopped with wall thickening remaining. Therefore, assessing the entire esophageal wall by CT/EUS for evaluation of treatment effect is necessary.
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