Diagnostic Obscurity of Gastrointestinal Subepithelial Tumors: An Organizing Gastric Hematoma Requiring En Bloc Resection

Gastric subepithelial tumors (SETs) are often incidentally found during examinations of the gastrointestinal tract. Able to arise from any layer of the stomach, these tumors are predominantly asymptomatic and are classified as either benign or malignant based on size, consistency, shape, and mobility as determined by endoscopic evaluation. We present the first reported case of a gastric SET presenting as a chronic organizing hematoma. In doing so, we discuss the necessity of multimodal imaging techniques and multidisciplinary management in identifying often obscure gastric SETs to intervene on potentially malignant masses early.