ArticleCancer innovation2026
Multiple Primary Malignancies in Patients With Gastric Cancer: A Retrospective Study in National Cancer Center of China.
Article in Cancer innovation, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- Multiple Primary Malignancies in Patients With Gastric Cancer: A Retrospective Study in National Cancer Center of China.Cancer innovation · 2026Article
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7 authors.
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Abstract
Background: Gastric cancer (GC) is a prevalent malignancy in China, posing significant health challenges. The persistently high tumor incidence and the rising number of tumor survivors may elevate the risk of multiple primary malignancies (MPMs) in GC patients. Methods: We conducted a retrospective study involving 11,045 patients diagnosed with gastric adenocarcinoma at National Cancer Center of China between 2010 and 2017. A 6-month interval distinguished synchronous MPMs (SMPMs) from metachronous MPMs (MMPMs). Results: Of all GC patients, 443 (4.01%) had MPM, with 75.85% being males and an average age of 60 at initial diagnosis. Among the MPM cases, 415 (93.68%) had two primary cancers (53.98% synchronous and 46.02% metachronous), 27 (6.09%) had three, and 1 (0.23%) had four, totaling 472 extra gastric cancer sites. Esophageal, colorectal, and lung cancers were the most prevalent concomitant malignancies, with esophageal cancer more frequent in synchronous cases and breast cancer (observed only in females) more frequent in metachronous cases (both Conclusions: MPM occurring in patients with GC predominantly involve the esophagus, colorectum, and lung. Elderly male patients with smoking or alcohol use represent a higher-risk group and warrant vigilant surveillance. This study provides a clinical and epidemiologic basis for future research on MPM in GC.
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