Abstract
The aim was to analyze the role of Epstein-Barr virus (EBV) in the bioclinical characteristics of patients treated for classic Hodgkin lymphoma (cHL) in France. Biopathologic data of 301 patients treated for a cHL in/or according to the EuroNet PHL-C1 trial between November 2008 and February 2013 were centrally reviewed. Median age at diagnosis was 14 (3 to 18) years and the F/M ratio 0.86, 0.47 before 10 years and 0.9 from 11 to 18. CHL subtypes were nodular sclerosis for 266/301 (88%) patients, mixed cellularity for 22/301 (7%), lymphocyte rich for 2/301 (1%), and 11/301 were unclassified. EBV positivity by in situ hybridization was observed for 68/301 (23%) patients, significantly associated with mixed cellularity subtype and male sex, particularly overrepresented in boys below 10 years: 15/23 (65%) versus 28/139 among other male patients (20%). EBV viral load was detectable in 22 of 108 (22%) tested cases and was overrepresented in EBV cHL (13/28) versus non-EBV cHL (9/80) patients. Detailed semiquantitative histologic analysis showed a high number of B-cell residual follicles in EBV cHL relative to EBV-negative HL. Distribution of EBV cHL in children and adolescents is associated with young age and male sex, suggesting a specific physiopathology and may require a differential therapeutic approach.
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