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The clinical, immunophenotypic and genetic features of these 10 patients were compared to the 27 patients who survived http://www.selleckchem.com/products/Fludarabine(Fludara).html were composed of diffuse sheets of predominantly medium-sized, centroblast-like cells with multiple small nucleoli, and with a variable number of larger cells admixed. Overall, the cells had more pleomorphism and variation in size and nuclear shape than is seen in BL. In some cases, the tumour cells had fine nuclear chromatin reminiscent of blasts. Mitotic figures and apoptotic bodies were frequent, and most of the cases had numerous tingible-body macrophages imparting a ��starry sky�� appearance (Fig?2A�CB). The median proliferation (Ki67) index was 90%, and 27 cases (70%) had a proliferation index ��80% (Fig?2B-inset). The majority of the cases (74%) had a GCB phenotype. Most of the cases (79%) strongly expressed BCL2 protein, but only 44% of these had a BCL2 gene rearrangement. Inversely, of 13 cases with http://www.selleckchem.com/products/Nolvadex.html a BCL2 gene rearrangement, 12 (92%) expressed BCL2 protein. Furthermore, all three cases with extra https://en.wikipedia.org/wiki/Chlormezanone copies of BCL2 expressed BCL2 protein. The median expression of MYC protein was 50% of the cells and, of the cases with MYC rearrangement, 69% had MYC protein expression in ��50% of the cells. Three cases with copy number gains of MYC showed MYC protein expression in 10%, 40% and 80% of the cells respectively. Using the survival tree method, multiple cut-off points for MYC and BCL2 immunostains were tested to see if any were predictive of survival, but none was predictive. Therefore, using cut-off points established for DLBCL (Perry et?al, 2012), the patients were divided into four subgroups based on BCL2 and CMYC protein expression: BCL2+/CMYC+, BCL2+/CMYC?, BCL2?/CMYC+ and BCL2?/CMYC?. However, there was no significant difference in OS or EFS among these four groups (Figure S2A�CB). Furthermore, neither Ki67 proliferation or the cell of origin (GCB versus non-GCB) was predictive of survival. Conventional cytogenetic studies were performed in eight cases and the complete karyotypes are shown in Table SIII. Five of the eight cases had complex karyotypes with multiple structural abnormalities. The t(8;14)(q24��1;q32) was present in four cases (Cases 2, 3, 5, and 6) and, in three of these, additional structural abnormalities were present. In Case 2, the t(8;14)(q24��1;q32) was the only cytogenetic abnormality. However, atypical cytological features and strong cytoplasmic positivity for BCL2 protein by immunohistochemistry led to the diagnosis of B-UCL rather than BL.