<unk> s <unk> s) are the most common mesenchymal neoplasms of the<unk>  tract.<unk> s 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). 95% of<unk> s stain positively for KIT (CD117). Most (66%) occur in the stomach and gastric<unk> s have a lower malignant potential than tumors found elsewhere in the GI tract.
Gastrointestinal stromal tumor
Ectopic pancreas
Krukenberg tumor
Signet ring cell carcinoma
Lipoblastoma
Nesidioblastoma
Angiomyofibroblastoma
Myxoid cyst