H Yamato1, K Ohshima, J Suzumiya, M Kikuchi. 1. Department of Pathology, School of Medicine, Fukuoka University, Nanakuma 7-45-1, Jonanku, Fukuoka 814-0180, Japan.
Abstract
AIMS: Pyothorax-associated lymphoma (PAL) develops in the pleural cavity of patients with a long history of pyothorax. Epstein-Barr virus (EBV) is also involved in PAL, similar to lymphomas in immunodeficient patients. Here we examined T-lymphocyte subsets as well as c-myc and REL gene amplification in PAL tissues. METHODS AND RESULTS: We determined the number and distribution of CD4+ and CD8+ T-lymphocytes, to evaluate T-cells in the host immune reaction in seven cases of PAL. As controls, we also studied 10 cases of extranodal diffuse large B-cell lymphoma (DLBL) and 10 cases of nodal DLBL. Chromosomal imbalances in PAL were determined by using comparative genomic hybridization (CGH) analysis. The mean numbers of CD4+ and CD8+ and their ratio were significantly lower in PAL than in nodal DLBL. CGH analysis of PAL showed amplification of the 8q24 chromosomal region. In addition, c-myc amplification was found in four cases of PAL by Southern blot analysis. CONCLUSIONS: Our results suggest that the development of PAL may involve a local immunosuppressive environment and that amplification of c-myc might promote tumour progression, as has been described in the development of Burkitt's lymphoma.
AIMS: Pyothorax-associated lymphoma (PAL) develops in the pleural cavity of patients with a long history of pyothorax. Epstein-Barr virus (EBV) is also involved in PAL, similar to lymphomas in immunodeficientpatients. Here we examined T-lymphocyte subsets as well as c-myc and REL gene amplification in PAL tissues. METHODS AND RESULTS: We determined the number and distribution of CD4+ and CD8+ T-lymphocytes, to evaluate T-cells in the host immune reaction in seven cases of PAL. As controls, we also studied 10 cases of extranodal diffuse large B-cell lymphoma (DLBL) and 10 cases of nodal DLBL. Chromosomal imbalances in PAL were determined by using comparative genomic hybridization (CGH) analysis. The mean numbers of CD4+ and CD8+ and their ratio were significantly lower in PAL than in nodal DLBL. CGH analysis of PAL showed amplification of the 8q24 chromosomal region. In addition, c-myc amplification was found in four cases of PAL by Southern blot analysis. CONCLUSIONS: Our results suggest that the development of PAL may involve a local immunosuppressive environment and that amplification of c-myc might promote tumour progression, as has been described in the development of Burkitt's lymphoma.
Authors: Yasodha Natkunam; John R Goodlad; Amy Chadburn; Daphne de Jong; Dita Gratzinger; John K C Chan; Jonathan Said; Elaine S Jaffe Journal: Am J Clin Pathol Date: 2017-02-01 Impact factor: 2.493
Authors: Xiaoming Qiu; Yi Liu; Yanjie Qiao; Gang Chen; Tao Shi; Jun Chen; Qinghua Zhou Journal: World J Surg Oncol Date: 2014-04-22 Impact factor: 2.754