Year 2023 / Volume 115 / Number 12
Letter
Primary rectal mucosa-associated lymphoid tissue lymphoma masquerading as proctitis

744-745

DOI: 10.17235/reed.2023.9872/2023

Jin-Yan Zhang, Bao-Zhong Fu, Zhi-Kun Yin, Ji Li,

Abstract
A 29-year-old male presented with recurrent mucous bloody stools for more than a year. Colonoscopy revealed ill-defined, mildly congested and edematous mucosa with scattered erosion spots in the lower rectum, highly suspicious for proctitis. Histopathology showed diffuse infiltration of small to medium-sized lymphoid cells in the lamina propria. Immunohistochemistry indicated these cells were positive for CD20, CD79a, CD19, kappa and lambda light chains (partial), and negative for CD3, CD5, CD10, cyclin D and BCL-6. These results were consistent with mucosa-associated lymphoid tissue (MALT) lymphoma. Further investigations consisting of upper endoscopy, bone marrow biopsy, and whole-body PET/CT scan did not detect any extrarectal lesions. Based on these findings, the diagnosis of stage I primary rectal MALT lymphoma was made. The patient underwent 15 fractions of radiotherapy with a total dose of 30 Gy. His symptoms were alleviated following the treatment. A follow-up colonoscopy performed 3 months later showed complete resolution of the lesion.
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References
Correia J, Pimenta M, Ponte A, et al. Digestive tract MALT lymphoma, an unusual location. Rev Esp Enferm Dig 2022;114(9):562-3. doi: 10.17235/reed.2022.8800/2022.
Jeon MK, So H, Huh J, et al. Endoscopic features and clinical outcomes of colorectal mucosa-associated lymphoid tissue lymphoma. Gastrointest Endosc 2018;87(2):529-39. doi: 10.1016/j.gie.2017.08.027.
Tao Y, Nan Q, Lei Z, et al. Rare primary rectal mucosa-associated lymphoid tissue lymphoma with curative resection by endoscopic submucosal dissection: A case report and review of literature. World J Clin Cases. 2022;10(21):7599-608. doi: 10.12998/wjcc.v10.i21.7599.
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Zhang J, Fu B, Yin Z, Li J. Primary rectal mucosa-associated lymphoid tissue lymphoma masquerading as proctitis. 9872/2023


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Publication history

Received: 26/07/2023

Accepted: 11/08/2023

Online First: 14/09/2023

Published: 12/12/2023

Article Online First time: 50 days

Article editing time: 139 days


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