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Cytogenetic complexity and heterogeneity in intravascular lymphoma
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Cytogenetic complexity and heterogeneity in intravascular lymphoma
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Cytogenetic complexity and heterogeneity in intravascular lymphoma
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Journal Article
Cytogenetic complexity and heterogeneity in intravascular lymphoma
2021
Overview
AimsTo characterise the karyotypic abnormalities and heterogeneities in intravascular lymphoma (IVL).MethodsG-banded karyotyping was performed on biopsy specimens from a single-centre IVL cohort comprising intravascular large B-cell lymphoma (IVLBCL, n=12) and NK/T-cell lymphoma (IVNKTCL, n=1).ResultsFive IVLBCL cases and one IVNKTCL case (total 46%) were found to have normal karyotypes, and the cytogenetic abnormalities observed in the other seven IVLBCL cases (54%) were investigated further. These seven karyotypes were uniformly complex with an average of 13 aberrations. The seven cases all had abnormalities involving chromosome 6, with 57% involving structural abnormalities at 6q13, and chromosome 8, with 43% involving abnormalities at 8p11.2. In addition, 71% had aberrations at 19q13. On average, 4.4 chromosomal gains and losses were detected per case. Cytogenetic heterogeneities were observed in six cases (86%) and tetraploidy in three cases (43%). There was no significant difference in progression-free survival (p=0.92) and overall survival (p=0.61) between the IVLBCL cases with complex and normal karyotypes.ConclusionApproximately half of IVLBCL cases had a highly heterogeneous pattern of karyotypes with different clonal numerical and structural chromosome aberrations.
Publisher
BMJ Publishing Group Ltd and Association of Clinical Pathologists,BMJ Publishing Group LTD
Subject
/ Aged
/ Biomarkers, Tumor - genetics
/ Biopsy
/ Female
/ G-band
/ Genetic Predisposition to Disease
/ Humans
/ Lymphoma
/ Lymphoma, Extranodal NK-T-Cell - genetics
/ Lymphoma, Extranodal NK-T-Cell - mortality
/ Lymphoma, Extranodal NK-T-Cell - pathology
/ Lymphoma, Extranodal NK-T-Cell - therapy
/ Lymphoma, Large B-Cell, Diffuse - genetics
/ Lymphoma, Large B-Cell, Diffuse - mortality
/ Lymphoma, Large B-Cell, Diffuse - pathology
/ Lymphoma, Large B-Cell, Diffuse - therapy
/ Male
/ Mutation
/ Vascular Neoplasms - genetics
/ Vascular Neoplasms - mortality
