PT  - JOURNAL ARTICLE
AU  - Kohei Fujikura
AU  - Daisuke Yamashita
AU  - Makoto Yoshida
AU  - Takayuki Ishikawa
AU  - Tomoo Itoh
AU  - Yukihiro Imai
TI  - Cytogenetic complexity and heterogeneity in intravascular lymphoma
AID  - 10.1136/jclinpath-2020-206573
DP  - 2021 Apr 01
TA  - Journal of Clinical Pathology
PG  - 244--250
VI  - 74
IP  - 4
4099  - http://jcp.bmj.com/content/74/4/244.short
4100  - http://jcp.bmj.com/content/74/4/244.full
SO  - J Clin Pathol2021 Apr 01; 74
AB  - Aims To characterise the karyotypic abnormalities and heterogeneities in intravascular lymphoma (IVL).Methods G-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).Results Five 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.Conclusion Approximately half of IVLBCL cases had a highly heterogeneous pattern of karyotypes with different clonal numerical and structural chromosome aberrations.