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Diagnostic and therapeutic strategies for histologically undiagnosed gastric submucosal tumor (SMT) and histologically diagnosed gastric gastrointestinal stromal tumor (GIST). High-risk features include ulceration, irregular borders, internal heterogeneity, enlargement of regional lymph nodes, and an increase in size during follow-up. CT computed tomography, EUS endoscopic ultrasonography, EUS-FNA endoscopic-ultrasonography-guided fine-needle aspiration biopsy
