CD5-positive, Small B-Cell Lymphoproliferative Disorders: Aberrant Findings of CLL/SLL and MCL

Authors

  • Youjun Hu, MD
  • Marc Golightly, PhD

Abstract

Most common CD5-positive, small B cell lymphoproliferative disorders include chronic lymphocytic leukemia/small lymphocytic lymphoma (CLL/SLL) and mantle cell lymphoma (MCL).  Among these cases, atypical morphology, immunophenotype, and/or cytogenetic abnormalities are not uncommon.  As an aberrant marker, CD5 expression is not limited to the cells of CLL/SLL or MCL and has been found in other B cell lymphomas ( both low grade and more aggressive types).  CD5-negative CLL/SLL and MCL also are well documented, as are reports of other aberrant immunophenotypes of CLL/SLL and MCL. In addition, monoclonal B-cell lymphocytosis (MBL) of unknown significance has recently been reported in otherwise healthy individuals.  We review here the findings that do not fulfill the current definitions of CLL/SLL or MCL.  It is imperative that a pathologist should be familiar with these aberrant findings when considering CLL/SLL or MCL as a possible diagnosis.  Furthermore, these aberrant findings may be clues to further understanding these entities.

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Published

2010-10-31

How to Cite

Hu, MD, Y., & Golightly, PhD, M. (2010). CD5-positive, Small B-Cell Lymphoproliferative Disorders: Aberrant Findings of CLL/SLL and MCL. North American Journal of Medicine and Science, 3(4). Retrieved from https://najms.com/index.php/najms/article/view/489

Issue

Section

Clinical Perspective