An 85-year-old man was diagnosed with mucosa-associated lymphoid tissue (MALT) lymphoma of the colon in 20XX. Although Helicobacter pylori eradication was performed as part of the treatment, it was ineffective. He was followed-up by colonoscopy for 4 years without additional treatment and there was no interval change;however, he was lost to follow-up 6 years after the first visit. Nine years after the initial diagnosis, he presented with new MALT lymphoma lesions in the stomach and small intestine. Genetic analysis showed that a biopsy specimen was positive for API2/MALT1 fusion gene, and IgH rearrangement showed monoclonal banding between colon and stomach. This suggested disseminated monoclonal API2/MALT1-positive MALT lymphoma of the colon, stomach, and small intestine. Careful attention should be paid to the appearance of multiple lesions in MALT lymphoma.
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http://dx.doi.org/10.11405/nisshoshi.112.270 | DOI Listing |
J Med Case Rep
December 2024
Ministry of Health, Riyadh, Saudi Arabia.
Background: Klinefelter syndrome is considered one of the most common sex chromosome disorders affecting males. The presence of an extra X chromosome can alter the tendency to develop various cancers, including lymphomas. Lacrimal gland lymphoma is a disease of the elderly, with a median age of presentation of 70 years.
View Article and Find Full Text PDFDiagn Pathol
December 2024
Department of Pathology, Yantaishan Hospital Affiliated to Binzhou Medical University, Yantai, 264003, Shandong, China.
Extranodal marginal zone lymphoma of mucosa-associated lymphoid tissue (EMZL) is an indolent B-cell lymphoma that can involve various anatomic sites. EMZL is derived from post-germinal center marginal zone B cells and typically lacks bcl-6 expression. Herein, we report two post-treatment cases of EMZL where unexpected bcl-6 protein expression was observed in specimens obtained following recurrence or progression.
View Article and Find Full Text PDFJ Pathol
December 2024
Department of Pathology, University of Cambridge, Cambridge, UK.
Primary thyroid lymphomas comprise largely extranodal marginal zone lymphoma of mucosa-associated lymphoid tissue (EMZL) and diffuse large B-cell lymphoma (DLBCL), followed by follicular lymphoma (FL). They commonly develop from a background of Hashimoto's thyroiditis (HT), where dysregulated immune responses trigger autoreactive infiltrates and drive clonal B-cell evolution. To understand how these lymphomas and their relapse evolve, we investigated 10 cases by mutation profiling, including five with metachronous lymphomas [primary lymphoma (EMZL = 4, DLBCL = 1) with local relapse (EMZL = 3, DLBCL = 2)], one composite EMZL and Epstein-Barr virus (EBV)-positive DLBCL, and four lymphomas (EMZL = 3, FL = 1) with prior or subsequent biopsy showing HT.
View Article and Find Full Text PDFKorean J Gastroenterol
December 2024
Division of Gastroenterology, Department of Internal Medicine, Incheon St. Mary's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea.
The prevalence of gastric mucosa-associated lymphoid tissue (MALT) lymphoma in Korea has not been reported largely because, it is a relatively rare disease. Gastric MALT lymphoma is clinically important because of the high prevalence of () in Korea. The endoscopic findings of gastric MALT lymphoma are diverse, and it is often challenging to differentiate from gastric adenocarcinoma.
View Article and Find Full Text PDFVirchows Arch
December 2024
Institute of Pathology and Neuropathology, Eberhard Karls University of Tuebingen and Comprehensive Cancer Center, University Hospital Tuebingen, Liebermeisterstr. 8, 72076, Tuebingen, Germany.
Only 10% of new lymphoma diagnoses in the USA occur in children < 15 years. Although the same diagnostic criteria apply to both adult and pediatric lymphomas, there are important differences in some lymphoma subtypes. These differences are recognized by the World Health Organization (WHO) with the recent 2022 classification of pediatric tumors including pediatric hematopoietic tumors.
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