Journal of Pathology and Translational Medicine

Case Study

Composite chronic lymphocytic leukemia and mantle cell lymphoma involving the bone marrow: a case report and literature review: Roksolana Demianets, Susan O’Brien, Khosrow Mahdavi, Chenchen Niu, Sumayya Aslam, Truc Tran, Ying Zhang, Ashley Gamayo, Xiaohui Zhao, Sherif A. Rezk; J Pathol Transl Med. 2025;59(5):334-339. Published online September 8, 2025; DOI: https://doi.org/10.4132/jptm.2025.07.02

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Chronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL) is a clinically indolent lymphoproliferative disorder characterized by accumulation of mature B-cell lymphocytes. Given the common CD5 co-expression, mantle cell lymphoma (MCL) is one of the most important entities in the differential diagnosis. MCL and CLL/SLL might exhibit overlapping morphologic and immunohistochemical features, making diagnosis particularly difficult in cases of composite lymphomas. Here, we present a unique case of composite lymphoma in an 86-year-old male, along with a literature review on the immunophenotypic variability of both MCL and CLL, which should always be confirmed with additional ancillary cytogenetic and molecular studies.

Citations

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Cyclin D1 expression as a diagnostic biomarker in lymphoid neoplasms
Lukács Márk Szilárd, Molnár Gyopár Beáta, Gaál-Szőke Szidónia, Horváth Emőke
Bulletin of Medical Sciences.2025; 98(2): 164. CrossRef

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