PMID- 22005784 OWN - NLM STAT- MEDLINE DCOM- 20120604 LR - 20211020 IS - 1476-5551 (Electronic) IS - 0887-6924 (Linking) VI - 26 IP - 4 DP - 2012 Apr TI - High concordance of subtypes of childhood acute lymphoblastic leukemia within families: lessons from sibships with multiple cases of leukemia. PG - 675-81 LID - 10.1038/leu.2011.274 [doi] AB - Polymorphic genes have been linked to the risk of acute lymphoblastic leukemia (ALL). Surrogate markers for a low burden of early childhood infections are also related to increased risk for developing childhood ALL. It remains uncertain, whether siblings of children with ALL have an increased risk of developing ALL. This international collaboration identified 54 sibships with two (N = 51) or more (N = 3) cases of childhood ALL (ages <18 years). The 5-year event-free survival for 61 patients diagnosed after 1 January 1990 was 0.83 +/- 0.05. Ages at diagnosis (Spearman correlation coefficient, r(S) = 0.41, P = 0.002) were significantly correlated, but not WBCs (r(S) = 0.23, P = 0.11). In 18 sibships with successful karyotyping in both cases, six were concordant for high-hyperdiploidy (N = 3), t(12;21) [ETV6/RUNX1] (N = 1), MLL rearrangement (N = 1) or t(1;19)(q23/p13) (N = 1). Eleven sibships were ALL-subtype concordant, being T-cell ALL (T-ALL) (N = 5, of a total of six sibships, where the first-born had T-ALL) or B-lineage ALL belonging to the same cytogenetic subset (N = 6), a finding that differs significantly from the expected chance distribution (kappa: 0.58; P < 0.0001). These data indicate strong genetic and/or environmental risk factors for childhood ALL that are restricted to specific ALL subtypes, which must be taken into account, when performing epidemiological studies to reveal etiological factors. FAU - Schmiegelow, K AU - Schmiegelow K AD - Pediatric Clinics, The Juliane Marie Centre, The University Hospital Rigshospitalet, Copenhagen, Denmark. kschmiegelow@rh.dk FAU - Lausten Thomsen, U AU - Lausten Thomsen U FAU - Baruchel, A AU - Baruchel A FAU - Pacheco, C E AU - Pacheco CE FAU - Pieters, Rob AU - Pieters R FAU - Pombo-de-Oliveira, M S AU - Pombo-de-Oliveira MS FAU - Andersen, E W AU - Andersen EW FAU - Rostgaard, K AU - Rostgaard K FAU - Hjalgrim, H AU - Hjalgrim H FAU - Pui, C-H AU - Pui CH LA - eng GR - P30 CA021765/CA/NCI NIH HHS/United States GR - P30 CA21765/CA/NCI NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20111018 PL - England TA - Leukemia JT - Leukemia JID - 8704895 RN - 0 (Core Binding Factor Alpha 2 Subunit) RN - 0 (Oncogene Proteins, Fusion) RN - 0 (TEL-AML1 fusion protein) SB - IM MH - Child, Preschool MH - Core Binding Factor Alpha 2 Subunit MH - Female MH - Humans MH - Immunophenotyping MH - Infant MH - Leukocyte Count MH - Male MH - Oncogene Proteins, Fusion/genetics MH - Precursor Cell Lymphoblastic Leukemia-Lymphoma/classification/etiology/*genetics/mortality MH - Risk Factors EDAT- 2011/10/19 06:00 MHDA- 2012/06/05 06:00 CRDT- 2011/10/19 06:00 PHST- 2011/10/19 06:00 [entrez] PHST- 2011/10/19 06:00 [pubmed] PHST- 2012/06/05 06:00 [medline] AID - leu2011274 [pii] AID - 10.1038/leu.2011.274 [doi] PST - ppublish SO - Leukemia. 2012 Apr;26(4):675-81. doi: 10.1038/leu.2011.274. Epub 2011 Oct 18.