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However, it remains unclear which cancer subtypes contribute to this pattern and the lifetime cancer risk.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>This Swedish population-based matched cohort study investigated age- and subtype-specific cancer risks in Down syndrome. National healthcare registers were used to include 9742 individuals with Down syndrome, born in Sweden between 1930\u20132017. Each individual was matched by birth year, sex, and birth county to 50 comparisons. Hazard ratios (HRs) and 95% confidence intervals (95% CI) were calculated using Cox proportional hazard models.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Results<\/jats:title>\n                    <jats:p>Children with Down syndrome had a 20-fold increased risk of acute lymphoblastic leukaemia (ALL), and nearly a 500-fold increased risk of acute myeloid leukaemia (AML) before the age of 5. In contrast, individuals with Down syndrome had an overall lower risk of solid tumours, with significantly decreased risks for breast, prostate, lung, colorectal, gynaecological cancers, and melanoma, in adults. However, an increased risk was observed for testicular cancer and chondrosarcoma\/chondroblastoma.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>We present the most comprehensive profile of cancer risk in Down syndrome, aiming to guide clinical practices, encourage tailored surveillance recommendations, and incite research on chromosome 21\u2019s role in oncogenesis.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1038\/s41416-025-03318-5","type":"journal-article","created":{"date-parts":[[2025,12,26]],"date-time":"2025-12-26T10:33:07Z","timestamp":1766745187000},"page":"790-798","update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Lifetime risk of solid tumors and leukemia in Down Syndrome: a population-based Swedish matched cohort study"],"prefix":"10.1038","volume":"134","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0553-1460","authenticated-orcid":false,"given":"Alexandra","family":"Wachtmeister","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6907-4954","authenticated-orcid":false,"given":"Benedicte","family":"Bang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0009-3000-361X","authenticated-orcid":false,"given":"Ida","family":"Nordgren","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5998-4735","authenticated-orcid":false,"given":"Anna","family":"Martling","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8829-4813","authenticated-orcid":false,"given":"Bertil","family":"Johansson","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1201-7729","authenticated-orcid":false,"given":"Yunxia","family":"Lu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3034-9222","authenticated-orcid":false,"given":"Anna","family":"Skarin Nordenvall","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5210-7219","authenticated-orcid":false,"given":"Giorgio","family":"Tettamanti","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3285-4281","authenticated-orcid":false,"given":"Ann","family":"Nordgren","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2025,12,26]]},"reference":[{"key":"3318_CR1","doi-asserted-by":"publisher","first-page":"9","DOI":"10.1038\/s41572-019-0143-7","volume":"6","author":"SE Antonarakis","year":"2020","unstructured":"Antonarakis SE, Skotko BG, Rafii MS, Strydom A, Pape SE, Bianchi DW, et al. 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