Curative Conversion of Metastatic Gastric Cancer After Pembrolizumab-Trastuzumab-Based Therapy in a PD-L1-Negative, HER2-Positive Patient: A Case Report and Literature Review. MENA Journal of Case Reports, [S. l.], v. 1, n. 1, p. 30–38, 2026. DOI: 10.64913/mmrmjcr.v1i1.21. Disponível em: https://menamedicalresearch.com/journals/index.php/mjcr/article/view/21. Acesso em: 13 jun. 2026.