Abstract Gastric metastasis from breast cancer (GMBC) is a rare but diagnostically challenging condition, whose clinical and imaging features often mimic primary gastric cancer or treatment-related adverse effects. This study integrates a detailed case of a 54-year-old woman with Luminal B invasive lobular carcinoma who developed gastric metastasis during systemic therapy, with a systematic review of 35 recent cases (2019–2024) to delineate the clinical profile and management of GMBC.
