{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,12,16]],"date-time":"2025-12-16T09:40:01Z","timestamp":1765878001801,"version":"3.48.0"},"reference-count":38,"publisher":"Wiley","issue":"22","license":[{"start":{"date-parts":[[2025,11,20]],"date-time":"2025-11-20T00:00:00Z","timestamp":1763596800000},"content-version":"vor","delay-in-days":19,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["82370158"],"award-info":[{"award-number":["82370158"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/100017950","name":"Shanghai Municipal Health Commission","doi-asserted-by":"publisher","award":["SHDC2023CRD006"],"award-info":[{"award-number":["SHDC2023CRD006"]}],"id":[{"id":"10.13039\/100017950","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Cancer Medicine"],"published-print":{"date-parts":[[2025,11]]},"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:sec>\n                    <jats:title>Background<\/jats:title>\n                    <jats:p>This study aimed to investigate characteristics and outcomes of second primary multiple myeloma (2\u2010MM) stratified by prior primary malignancies (PPMs), and further explore the effect of PPM treatment modalities on multiple myeloma (MM) prognosis in the United States (US) population.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Methods<\/jats:title>\n                    <jats:p>The retrospective study was analyzed based on MM patients in the Surveillance, Epidemiology, and End Results (SEER) database (2000\u20132021). Patients with 2\u2010MM, defined as MM diagnosed \u2265\u20096\u2009months after a PPM, were stratified into 25 subgroups based on PPM categories. Univariable and multivariable competing risk regression models were constructed to estimate MM\u2010specific mortality. The Kaplan\u2013Meier method and a multivariable Cox regression model were conducted to analyze all\u2010cause mortality.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Result<\/jats:title>\n                    <jats:p>We identified 74,932 patients with first primary multiple myeloma (1\u2010MM) and 6465 patients with 2\u2010MM. Compared to the 1\u2010MM cohort, the 2\u2010MM cohort exhibited a higher proportion of males, older age at diagnosis, and greater representation of the White race. The multivariable analysis demonstrated a reduced risk of MM\u2010specific mortality in 2\u2010MM against 1\u2010MM. PPMs of soft tissue (including heart), melanoma of the skin, corpus uteri, prostate, kidney and renal pelvis, and lymphoma, showed protective effects on MM\u2010specific mortality in 2\u2010MM. Notably, many PPMs that developed into 2\u2010MM exhibited elevated all\u2010cause mortality risks in multivariable analysis. Additionally, chemotherapy for prior lymphoma was associated with an increased all\u2010cause mortality risk in 2\u2010MM patients, whereas, radiotherapy for prior breast cancer and surgery for prior prostate cancer were linked to a decreased risk.<\/jats:p>\n                  <\/jats:sec>\n                  <jats:sec>\n                    <jats:title>Conclusion<\/jats:title>\n                    <jats:p>Compared to 1\u2010MM, 2\u2010MM exhibited distinct characteristics and survival outcomes in adults, which were associated with PPM types and their treatment modalities. These findings provide critical insights for risk stratification and survivorship care in US adults.<\/jats:p>\n                  <\/jats:sec>","DOI":"10.1002\/cam4.71393","type":"journal-article","created":{"date-parts":[[2025,11,20]],"date-time":"2025-11-20T17:21:44Z","timestamp":1763659304000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Characteristics and Outcomes of Second Primary Multiple Myeloma in Adult Cancer Survivors: A Population\u2010Based Cohort Study"],"prefix":"10.1002","volume":"14","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3069-9305","authenticated-orcid":false,"given":"Nannan","family":"Li","sequence":"first","affiliation":[{"name":"Tongji University School of Medicine  Shanghai China"},{"name":"Department of Hematology, Tongji Hospital Tongji University School of Medicine  Shanghai 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