Exceptional response to chemo-immunotherapy in a patient with HER2-negative, TMB-high metastatic gastric mucinous adenocarcinoma: a case report and literature review
Gastric mucinous adenocarcinoma (GMC) is a rare subtype of gastric cancer characterized by excessive mucus production, aggressive biological behavior, and poor prognosis, with most patients presenting with metastatic disease at initial diagnosis and lo…