Expression of c-Myc, Bcl2, Bcl6, and Cyclin D1 in High-Grade B-Cell Lymphoma.

Background High-grade B-cell lymphomas (HGBLs), with c-Myc, Bcl2, and/or Bcl6 rearrangement, are aggressive neoplasms with poor clinical outcomes. Cyclin D1 is a proto-oncogene that is generally expressed by mantle cell lymphoma, its variants, and many other neoplasms. Aim The aim of this study is to investigate the expression and frequency of cyclin D1 in HGBL and its association with double expressor and triple expressor lymphomas. A few pieces of research have been reported on the expression of cyclin D1 in triple-hit lymphoma, renaming it quadruple-hit lymphoma. In the present study, we also used immunohistochemical (IHC) stains to look at the expression of cyclin D1 in double expressor and triple expressor. Methodology This is a cross-sectional descriptive study involving 60 cases, including both double and triple expressors, diagnosed by using hematoxylin and eosin (H&E) staining with subsequent IHC stains. We analyzed the expression of cyclin D1 in double expressor and triple expressor. Results The expression and frequency of cyclin D1 were interpreted in terms of positivity in double expressors and triple expressors. Cyclin D1 positivity was observed in three (5%) cases of double expressors and two (3.33%) cases of triple expressors. Overall, five (9%) cases of HGBL were positive for cyclin D1. Conclusion This study showed a very low frequency of cyclin D1 expression in double and triple expressor lymphomas. However, a few cases of HGBL showed expression of cyclin D1 and were not limited to only mantle cell lymphoma and its variants.