Granular cell tumor (GCT) is an uncommon, usually benign neoplasm; however, a malignant potential has been described. Malignant GCT is an extremely rare neoplasm showing rapid growth and invasion into adjacent muscles, lymph nodes, or vessels, or even distant metastasis. We recently experienced a case of a histologically benign or atypical but clinically malignant GCT, with invasion of the lymph nodes and vessels in the sigmoid colon, diagnosed by segmental colon resection with lymph node dissection. We also performed a review of relevant medical literature.

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A fibrovascular polyp is a rare benign disease of the upper digestive tract and is usually located in the esophagus. To our knowledge, this is the first case of gastric fibrovascular polyp presenting with melena reported in the English literature. The polyp was well visualized on endoscopy and removed with laparoscopic wedge resection. Histology confirmed fibrovascular polyp of the stomach.

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