This pictorial review illustrates ct and mr imaging appearance of gastrointestinal stromal tumor gist of the stomach and other lesions with similar imaging appearance gist of the stomach appears as well defined enhanced masses with characteristics of subeppthial neoplasms majority are exophytic . 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. Get this from a library imaging of gastrointestinal tract tumors jean noel bruneton 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 . Imaging carcinoid tumors of the gastrointestinal tract gastrointestinal imaging review the incidence and prevalence of carcinoid tumors within the various subsites of the gas trointestinal tract have changed significant ly in the past decade studies analyzing data from 1950 to 1969 reported the appendix as the most common site of . 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
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