{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T02:07:57Z","timestamp":1791338877012,"version":"4.3.1"},"reference-count":50,"publisher":"American Society of Hematology","issue":"4","content-domain":{"domain":["ashpublications.org"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2020,1,23]]},"abstract":"<jats:title>Abstract<\/jats:title>\n               <jats:p>Pediatric large B-cell lymphomas (LBCLs) share morphological and phenotypic features with adult types but have better prognosis. The higher frequency of some subtypes such as LBCL with IRF4 rearrangement (LBCL-IRF4) in children suggests that some age-related biological differences may exist. To characterize the genetic and molecular heterogeneity of these tumors, we studied 31 diffuse LBCLs (DLBCLs), not otherwise specified (NOS); 20 LBCL-IRF4 cases; and 12 cases of high-grade B-cell lymphoma (HGBCL), NOS in patients \u226425 years using an integrated approach, including targeted gene sequencing, copy-number arrays, and gene expression profiling. Each subgroup displayed different molecular profiles. LBCL-IRF4 had frequent mutations in IRF4 and NF-\u03baB pathway genes (CARD11, CD79B, and MYD88), losses of 17p13 and gains of chromosome 7, 11q12.3-q25, whereas DLBCL, NOS was predominantly of germinal center B-cell (GCB) subtype and carried gene mutations similar to the adult counterpart (eg, SOCS1 and KMT2D), gains of 2p16\/REL, and losses of 19p13\/CD70. A subset of HGBCL, NOS displayed recurrent alterations of Burkitt lymphoma\u2013related genes such as MYC, ID3, and DDX3X and homozygous deletions of 9p21\/CDKN2A, whereas other cases were genetically closer to GCB DLBCL. Factors related to unfavorable outcome were age &amp;gt;18 years; activated B-cell (ABC) DLBCL profile, HGBCL, NOS, high genetic complexity, 1q21-q44 gains, 2p16\/REL gains\/amplifications, 19p13\/CD70 homozygous deletions, and TP53 and MYC mutations. In conclusion, these findings further unravel the molecular heterogeneity of pediatric and young adult LBCL, improve the classification of this group of tumors, and provide new parameters for risk stratification.<\/jats:p>","DOI":"10.1182\/blood.2019002699","type":"journal-article","created":{"date-parts":[[2019,11,20]],"date-time":"2019-11-20T13:03:46Z","timestamp":1574255026000},"page":"274-286","update-policy":"https:\/\/doi.org\/10.1182\/blood.2019cm0000","source":"Crossref","is-referenced-by-count":120,"title":["Distinct molecular profile of IRF4-rearranged large B-cell lymphoma"],"prefix":"10.1182","volume":"135","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7108-7738","authenticated-orcid":false,"given":"Joan Enric","family":"Ramis-Zaldivar","sequence":"first","affiliation":[{"name":"Institut d\u2019Investigacions Biom\u00e8diques August Pi i Sunyer, Barcelona, Spain;"},{"name":"Centro de Investigaci\u00f3n Biom\u00e9dica en Red de C\u00e1ncer, Madrid, Spain;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1796-7248","authenticated-orcid":false,"given":"Blanca","family":"Gonzalez-Farr\u00e9","sequence":"additional","affiliation":[{"name":"Institut d\u2019Investigacions Biom\u00e8diques August Pi i Sunyer, Barcelona, Spain;"},{"name":"Centro de Investigaci\u00f3n Biom\u00e9dica en Red de C\u00e1ncer, Madrid, Spain;"},{"name":"Hematopathology Unit, Hospital Cl\u00ednic de Barcelona, University of Barcelona, Barcelona, Spain;"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5099-3675","authenticated-orcid":false,"given":"Olga","family":"Balagu\u00e9","sequence":"additional","affiliation":[{"name":"Hematopathology Unit, Hospital Cl\u00ednic de Barcelona, University of Barcelona, Barcelona, 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