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要旨 患者は60歳代,男性.下痢が増悪したため近医に入院となった.胸腹部造影CT検査で小腸全体に壁肥厚を認めたため,小腸精査目的で当院へ紹介され,受診となった.カプセル内視鏡検査で小腸全体に粗糙粘膜,潰瘍,びらんなど多彩な変化を認め,ダブルバルーン内視鏡下の精査でenteropathy-associated T-cell lymphomaと診断した.化学療法後に行った内視鏡検査では顆粒状粘膜はみられたが,潰瘍は消失していた.病理組織像では腫瘍細胞は残存していた.その後治療を行ったが,効果はなく,初回診断後から1年1か月後に死亡した.enteropathy-associated T-cell lymphomaは腸管原発のT細胞性リンパ腫であり,内視鏡所見の報告は少なく,予後不良である.自験例では内視鏡検査での診断,経過観察が可能であり,治療効果判定に有効であった.
A male in his sixties was admitted to a local hospital because of severe diarrhea. Abdominal CT(computed tomography)scan showed wall thickenings throughout the small intestine ; the patient was referred to our hospital for further investigations.
Capsule endoscopy revealed several changes, including fine granular mucosa, erosions, and ulcers. Retrograde DBE(double-balloon enteroscopy)showed similar changes. Based on the findings of pathological examination, immunophenotyping by flow cytometry, and T-cell receptor gene rearrangement, EATL(enteropathy-associated T-cell lymphoma)was diagnosed.
Retrograde DBE performed again after chemotherapy revealed diffuse fine granular changes with no ulceration in the ileum. Histological examination revealed a residual tumor. Although chemotherapy was continued, the patient died of lymphoma 13 months after diagnosis.
EATL is a primary gastrointestinal T-cell lymphoma with poor prognosis, and reports of endoscopic findings of EATL are rare. DBE is effective for diagnosis, assessment, and observation of EATL.
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