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
Citations to this article as recorded by
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