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- W4377013692 abstract "Abstract Purpose We report one collision tumor of the ascending colon adenocarcinoma and primary diffuse large B-cell lymphoma, not otherwise specified (DLBCL, NOS) with molecular genetics analyses. Methods The present case and twenty-two previous cases with collision tumors of primary colorectal lymphoma and adenocarcinoma were reviewed. Clinicopathological characteristics, molecular genetics analyses, possible pathogenesis, management and prognosis of the tumor were analyzed. Results A 74-year-old female patient was found to have an invasive adenocarcinoma in the ascending colon, and underwent laparoscopic radical resection of right colon cancer. The mass comprised of two tumors was found incidentally through postoperative pathological sampling. Molecular genetics and immunohistochemical analyses showed collision tumor of DLBCL, NOS with germinal-center B-cell (GCB) subtype and TP53 mutation, and adenocarcinoma arising in a tubulovillous adenoma in the colon, with BRAF mutation and MLH1 promoter methylation. The mean age of the 23 patients was 73 years. The most cases of the available histopathological staging of adenocarcinoma were stage I (7/16), whereas those of lymphoma components were stage Ⅳ (10/20). The most common histological subtypes of the lymphoma were B-cell lymphomas (22/23). There were 15 cases with follow-up data including 11 alive and 4 dead with a 3-year overall survival rate (OS) of 71.5%. Conclusions Our report highlights the need for pathologists, radiologists, surgeons and oncologists to be aware of the rare possibility of collision tumors. The accurate molecular genetics analyses and comprehensive treatment including surgery combined with chemotherapy are required for the rare cases." @default.
- W4377013692 created "2023-05-19" @default.
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- W4377013692 date "2023-05-18" @default.
- W4377013692 modified "2023-09-29" @default.
- W4377013692 title "Collision tumor of primary malignant lymphoma and adenocarcinoma in the colon, diagnosed by molecular genetics analyses: case report and review of literature" @default.
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- W4377013692 doi "https://doi.org/10.21203/rs.3.rs-2928918/v1" @default.
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