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차라리 ( Ra Ri Cha ),백동훈 ( Dong Hoon Baek ),이경원 ( Gyeong Won Lee ),박선자 ( Seun Ja Park ),이종훈 ( Jong Hoon Lee ),박종하 ( Jong Ha Park ),김태오 ( Tae Oh Kim ),이상훈 ( Sang Heon Lee ),김형욱 ( Hyung Wook Kim ),김현진 ( Hy 대한소화기학회 2021 대한소화기학회지 Vol.78 No.6
Background/Aims: This multicenter study reviewed the clinical features and prognosis according to the primary site of involvement and the treatment modality in patients with B-cell primary intestinal lymphoma (PIL). Methods: Among 125 consecutive patients diagnosed with PIL, 100 patients were analyzed. Results: The median age was 59 years, and the male to female ratio was 1.86:1. Diffuse large B-cell lymphoma (66/100, 66.0%) was the most common histological subtype. The estimated 5-year survival rate (5-YSR) was 48.5%. The 5-YSR was similar regardless of the type of primary treatment (chemotherapy alone vs. surgery/chemotherapy, 50.7 vs. 45.3%, p=0.582). A comparison of the survival according to the primary site of involvement revealed a 5-YSR of 32.5% (p=0.027), 64.3% (reference), 46.5% (p=0.113), and 49.8% (p=0.024) for the small intestine, ileocecal region, large intestine, and multiple sites, respectively. Multivariate analysis, however, revealed a low hemoglobin level, advanced Ann Arbor stage, and aggressive histological type to be independent prognostic factors for shorter survival but not ileocecal region involvement. Conclusions: The Ann Arbor stage, hemoglobin level, and histological type were independent prognostic factors for survival, while the primary site of involvement and treatment modality did not affect the prognosis in patients with B-cell PIL. (Korean J Gastroenterol 2021;78:320-327)