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Gastrointestinal Stromal Tumors

Gastrointestinal stromal tumors are mesenchymal tumors found in the gastrointestinal tract that originate from the interstitial cells of Cajal, the pacemaker cells that regulate peristalsis in the digestive tract. Approximately 70% of GISTs develop in the stomach, 20% in the small intestine, and less than 10% in the esophagus, colon, and rectum. GISTs are typically more cellular than other gastrointestinal sarcomas. They occur predominantly in patients who are 40 to 70 years old but in rare cases may occur in younger persons (Miettinen et al., 1999, 1999). GISTs can also be seen in neurofibromatosis-1 (NF1; 162200) due to mutations in the NF1 gene, and are thus distinct from the GISTs described here. Sandberg and Bridge (2002) reviewed the cytogenetics and molecular genetics of gastrointestinal stromal tumors. Coffey et al. (2007) reviewed the clinical features, pathogenesis, and molecular treatments of Menetrier disease (137280) and GIST, both of which are hyperproliferative disorders of the stomach caused by dysregulated receptor tyrosine kinases. [from OMIM]

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Neoplastic Process

Gastrointestinal stroma tumor

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