Delayed Presentation of Metastatic Breast Cancer Masquerading as Nonspecific Gastritis

Gastric metastasis from breast cancer is often difficult to diagnose due to nonspecific symptoms and variable endoscopic findings. We report a case of a 64-year-old woman with a long history of stable metastatic breast cancer to the spine who presented with new-onset weight loss and nausea. Cross-sectional imaging was negative for cancer spread to the gastrointestinal tract. She was found to have biopsy-proven breast cancer cells in the stomach, despite the absence of gastric lesions in a follow-up positron emission tomography scan. Apart from minimal gastritis, there were no visible nodules, ulcers, or features of linitis plastica on endoscopy.