Endoscopic Mucosal Resection of a Solitary Metastatic Tumor in the Stomach: A Case Report

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Endoscopic mucosal resection (EMR) is increasingly being utilized in the management of early gastric cancer. Metastatic cancer of the stomach is uncommon. We report a case of solitary gastric metastasis from renal cell carcinoma (RCC) that was successfully excised with EMR. A 71-year-old man presented with iron deficiency anemia, he had undergone a radical nephrectomy for RCC 3 years previously. Upper gastrointestinal endoscopy revealed a malignant-appearing 10×12 mm polyp in the stomach. Histopathology of the biopsy revealed that it was a metastasis from RCC, confirmed by immunohistochemistry with Vimentin and CAM 5.2 positivity. Computed tomography and bone scanning revealed no other metastases. Simultaneous laparoscopy and upper gastrointestinal endoscopy revealed that the lesion was localized to the gastric mucosa. EMR of the tumor en bloc was performed successfully. Histology confirmed a complete excision. He had an uneventful postoperative course and is well 15 months after surgery, without any tumor recurrence.

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