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Background/aim: Meckel's diverticulum carcinoma (MDCa) is extremely rare. It is often advanced when found, and the prognosis is poor. Effective treatment for this cancer has not yet been developed. We previously established a patient-derived xenograft (PDX) nude-mouse model of MDCa. In the present study, we investigated the efficacy of oxaliplatinum (L-OHP) and 5-fluorouracil (5-FU) on an MDCa PDX nude-mouse model., Materials and Methods: PDX mouse models of MDCa were divided into three groups (five mice per group): untreated control; L-OHP-treated; and 5-FU-treated. Tumor volumes of the three groups were compared after 2 weeks., Results: L-OHP arrested tumor growth (p=0.038) and 5-FU apparently eradicated the tumor (p=0.007)., Conclusion: L-OHP and 5-FU are candidates for clinical first-line therapy of MDCa., (Copyright © 2023, International Institute of Anticancer Research (Dr. George J. Delinasios), All rights reserved.)

A 42-year-old man was found to have an adenocarcinoma arising from ectopic gastric mucosa in Meckel's diverticulum, as diagnosed with surgical pathology. Recurrence was recognized with massive ascites at 1 year and 6 months after surgery. Chemotherapy in the first and second lines was not effective. In the third line of chemotherapy, pemetrexed and carboplatin were both administered and this resulted in a good response for massive ascites. This palliative therapy was effective and safe.