Browsing by Author "Talukdar, M."
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Item Comparative analysis of immunohistochemical features of nodal versus extranodal diffuse large B cell lymphoma with respect to cell-of-origin classification(Mrs Dipika Charan of MedScience (India) Publications, 2022-09) Nandi, A; Sengupta, S; Das, K; Talukdar, M.Background: Diffuse large B-cell lymphoma (DLBCL) represents a heterogeneous group of lymphoid malignancies with distinct oncogenic events and clinical behavior that cannot be unraveled by morphology and immunophenotype alone. Simple biological segregation such as the Hans classifier helps to explain the heterogeneous responses to standard treatment and provides a rationale for the investigation of novel targeted therapies. Aims and Objectives: In this study, we tried to estimate immunohistochemical (IHC) features of nodal and extranodal DLBCL using cell-of-origin classification (Hans Algorithm) with the markers CD10, Bcl-6, MUM1. Materials and Methods: Blocks of the patients with a histological diagnosis of DLBCL over the past 3 years were retrieved and submitted for IHC analysis to classify into germinal center B cell type (GCB) and non-GCB type. Results: Mean age for nodal DLBL was 48.19 � 14.68 years, extranodal were 55.7 � 13.22 years. Mean age for GCB were 56.6 � 15.66 years whereas for non-GCB were 51.45 � 12.85 years. Among nodal lymphomas cervical was the most common site and among extranodal lymphomas, intestinal lymphomas were commonest (including colorectal). Relative proportion of GCB among extranodal was 28.78%, whereas in nodal DLBCL it was 16.67%, relative risk of getting GCB type DLBCL was 1.72 times higher in extranodal compared to nodal DLBCL (P = 0.081). Total positivity of MUM1 was 17%, whereas for Bcl6 and CD10 it was 29% and 15% respectively. Ki67 was considerably higher in GCB type and for extranodal DLBCL in our study. Conclusion: Proportion of extranodal GCB type DLBCL compared to nodal DLBCL is considerably higher in our study population, though it varies greatly among Asian and world data. Uniform meta-analysis and systematic review is necessary to stratify.Item Study of extra-nodal lymphoma with special reference to histomorphology, immunohistochemistry, and topographical distribution(Mrs Dipika Charan of MedScience (India) Publications, 2022-05) Sardar, GS; Bandyopadhyay, G; Chowdhury, AR; Talukdar, M.Background: Primary extra-nodal lymphomas (ENLs) are rare neoplasm but can affect many organ systems of body. Proper and timely diagnosis and justified treatment of primary ENL are often affected due to variety of lymphoma types and the relative rarity of many of these tumor types. They are mainly of Non-Hodgkin lymphoma which further consists of many subtypes having variation of epidemiology and clinical presentation along with geographic distribution. Aim and Objectives: Aim and objectives of the study were to find out topographical distribution and histological patterns of ENL along with their immunohistochemical character in a tertiary care hospital of Eastern India. Materials and Methods: All the cases from April 2015 to March 2018 diagnosed as ENL by histopathological examination were included in this descriptive cross-sectional study for further immunohistochemical analysis for CD45 Life-cycle assessment (LCA), CD3 and CD 20 to identify the cell of origin (B cell vs. T cell). Results: Out of total 31 cases, 67.74% were male and the most common age group was 51–60 years. Gastrointestinal tract was the most common organ system (61.29% of cases) affected and stomach (29.03%) followed by Ileum (9.67%) were the most common sites affected by ENL. Histomorphologically diffuse large cell lymphoma was the most common pattern while immunohistochemistry study revealed all the cases were B cell type with LCA and CD 20 positive and CD3 negative. Conclusion: This study revealed the topographical pattern along with predominant histomorphological and immunohistochemical character of ENL in study population. However, further studies with meta- analysis can enlighten these characters more comprehensively.