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Karger AG","issue":"1","license":[{"start":{"date-parts":[[2026,7,18]],"date-time":"2026-07-18T00:00:00Z","timestamp":1784332800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"},{"start":{"date-parts":[[2026,7,18]],"date-time":"2026-07-18T00:00:00Z","timestamp":1784332800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Case Rep Oncol"],"abstract":"<jats:p>Introduction: The synchronous presentation of two distinct primary malignancies in the stomach, specifically gastric adenocarcinoma (GAC) and mucosa-associated lymphoid tissue (MALT) lymphoma, is an extremely rare clinical entity. These dual primary tumors challenge standard management protocols due to their differing biologies. Case Presentation: We present a case of a patient diagnosed with concurrent GAC and MALT lymphoma who was also found to have a pulmonary nodule, creating a complex staging dilemma. Surgical pathology revealed distinct neoplastic entities: gastroesophageal junction adenocarcinoma, gastric MALT lymphoma, and a pulmonary hamartoma. We provide a narrative review of selected cases from the literature to contextualize this finding. Conclusion: Our observations suggest that in such complex presentations, the prognosis is often driven by the higher-grade malignancy, necessitating a multidisciplinary approach to distinguish between metastatic disease and synchronous benign or indolent lesions.<\/jats:p>","DOI":"10.1159\/000553248","type":"journal-article","created":{"date-parts":[[2026,7,18]],"date-time":"2026-07-18T16:00:33Z","timestamp":1784390433000},"page":"1300-1311","source":"Crossref","is-referenced-by-count":0,"title":["Concurrent Adenocarcinoma and Mucosa-Associated Lymphoid Tissue Lymphoma of the Stomach: A Case Report and Narrative Literature Review"],"prefix":"10.1159","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-5066-0125","authenticated-orcid":false,"given":"Sarah 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