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The patient, previously treated with multiple lines of chemotherapy for MALT lymphoma, was admitted to our hospital with lower abdominal and perineal pain accompanied by gross hematuria for one week. Cystoscopic examination and transurethral resection of the bladder lesion confirmed the diagnosis of bladder cancer. She later underwent laparoscopic radical cystectomy, and postoperative histopathological evaluation revealed invasive urothelial carcinoma infiltrating the cervical and vaginal fornix stroma.<\/jats:p>","DOI":"10.3389\/fonc.2026.1734661","type":"journal-article","created":{"date-parts":[[2026,2,25]],"date-time":"2026-02-25T05:33:30Z","timestamp":1771997610000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["Metachronous multiple primary cancers involving pulmonary non-Hodgkin lymphoma and bladder cancer: a case report"],"prefix":"10.3389","volume":"16","author":[{"given":"Kunlei","family":"Tan","sequence":"first","affiliation":[{"name":"Department of Urology, Zhuzhou Central Hospital","place":["Zhuzhou, Hunan, China"]},{"name":"Department of Pathology, Zhuzhou Central Hospital","place":["Zhuzhou, Hunan, China"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Xiyun","family":"Quan","sequence":"additional","affiliation":[{"name":"Department of Urology, Zhuzhou Central Hospital","place":["Zhuzhou, Hunan, China"]},{"name":"Department of Pathology, Zhuzhou Central Hospital","place":["Zhuzhou, Hunan, China"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Miduo","family":"Tan","sequence":"additional","affiliation":[{"name":"Department of Breast Surgery, Zhuzhou Central Hospital","place":["Zhuzhou, Hunan, China"]}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhijun","family":"Han","sequence":"additional","affiliation":[{"name":"Department of Urology, Zhuzhou Central Hospital","place":["Zhuzhou, Hunan, China"]}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1965","published-online":{"date-parts":[[2026,2,25]]},"reference":[{"key":"B1","doi-asserted-by":"publisher","first-page":"1045","DOI":"10.1186\/s12885-021-08766-9","article-title":"Risks and cancer associations of metachronous and synchronous multiple primary cancers: a 25-year retrospective study","volume":"21","author":"Tanjak","year":"2021","journal-title":"BMC Cancer"},{"key":"B2","article-title":"Multiple primary malignant tumors. 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