AUTHOR=Ji Yunfei , Li Hujun , Zhang Huanxin , Cheng Hai , Wang Ying , Xu Kailin , Li Zhenyu TITLE=Effect of metachronous primary and secondary solid cancers in patients with multiple myeloma: a retrospective study from a single-center JOURNAL=Frontiers in Immunology VOLUME=16 YEAR=2025 URL=https://www.frontiersin.org/journals/immunology/articles/10.3389/fimmu.2025.1516471 DOI=10.3389/fimmu.2025.1516471 ISSN=1664-3224