Gastrointestinal stromal tumor gist is the most common subepithelial neoplasm that can be found throughout the gastrointestinal tract but most of them occur in the stomach. Gastrointestinal stromal tumors gists are a subset of gi mesenchymal tumors of varying differentiation previously these tumors were classified as gi leiomyomas leiomyosarcomas leiomyoblastomas or schwannomas on the basis of histologic findings and the fact that these tumors apparently originate in the muscularis propria layer of the intestinal wall. Gastrointestinal stromal tumors gists are the most common mesenchymal neoplasms of the gastrointestinal tract gists arise in the smooth muscle pacemaker interstitial cell of cajal or similar cells they are defined as tumors whose behavior is driven by mutations in the kit gene 85 pdgfra gene 10 or braf kinase rare. Imaging of gastrointestinal tract tumors describes current imaging practice for the most commonly encountered benign and malignant digestive tract tumors and gives a review of the literature for less frequent tumors. Gastrointestinal stromal tumors or other type of gi tumor the doctor will use imaging tests or endoscopy exams to help find out if it is cancer or something else of the inner lining of the gi tract this can make them harder to see with endoscopy than more common gi tract tumors which typically start in the mucosa
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