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要旨●HGD(high grade dysplasia)ないし癌を合併した潰瘍性大腸炎(UC)に対しては,大腸全摘術が標準治療とされてきた.しかし,近年の遡及的研究では,内視鏡切除(ER)により大腸全摘術が回避できたとの結果が示されている.ただし,UC患者に対するERでは範囲診断や線維化などの技術的な問題が残されている.一方,ER後も異時性多発病変が問題となるため,本邦のガイドラインにおいてERはLGD(low grade dysplasia)に限定し,術後の慎重な経過観察が必須とされている.UCにおけるERの適応と治療効果に関しては,さらなるエビデンスの集積が必要である.
Total colectomy is the standard treatment for ulcerative colitis(UC)complicated with high-grade dysplasia and cancer. However, endoscopic resection has become an option for intramucosal lesions, although it remains challenging because of technical difficulties and obscure margins of the target lesion. Given the high risk of metachronous lesions, Japanese guidelines state that endoscopic resection should be restricted to low-grade dysplasia and to patients able to undergo subsequent careful follow-up. However, more recent retrospective studies have suggested that endoscopic resection contributes to reduced use of total colectomy for patients with UC. More evidence is needed to establish its indications for UC.

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