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小腸のびまん性大細胞型B細胞リンパ腫(DLBCL)の診断には,小腸X線造影,カプセル内視鏡(VCE),CTとバルーン内視鏡(BAE)などの検査が用いられる.小腸X線造影やVCE検査は存在診断と範囲診断の役割を果たすが,質的診断は不十分となる.VCEは滞留の危険性を有する.BEは腫瘍まで到達できれば,内視鏡診断と生検診断が可能である.当院におけるBAEによる病変への到達は13/14例(92.9%)であり,生検による正診率は13/14例(92.9%)であった.病変は単発で不整形の陥凹性病変が多く,腫瘍のボリュームに比べて腸管狭窄とそれによる症状は軽度な場合が多かった.大腸のDLBCLの診断には,注腸X線造影や大腸内視鏡検査が用いられる.病変は回盲部と直腸に多く認められる.
Fluoroscopic enteroclysis/enterography, VCE(videocapsule endoscopy), CT(computed tomography), and BAE(balloon-assisted enteroscopy)are primary tools for the diagnosis of DLBCL(diffuse large B-cell lymphoma)with small-bowel involvement. Fluoroscopic enteroclysis/enterography and VCE are helpful in detecting the lesion and determining its location. However, they do not allow for histopathological confirmation. BAE aids detailed characterization and histopathological diagnosis by means of biopsy specimens when the lesion is accessible. The access rate of lesions for BAE was 92.8%(13/14cases), and the histopathological diagnosis of small-bowel DLBCL was confirmed in 92.8%(13/14)cases. Frequent subtypes of small-bowel DLBCL were irregular and depressed types : abdominal symptoms were not severe, in contrast to cases of large-size tumors. Colorectal DLBCL was primarily diagnosed after colonoscopy or a barium enema with imaging. The ileocecal area and the rectum were the most frequent sites of DLBCL.
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