Imaging of Gastrointestinal Stromal Tumor

作者: Ihab R. Kamel , Elliot K. Fishman

DOI: 10.1007/0-387-31056-8_30

关键词:

摘要: Gastrointestinal stromal tumor (GIST) is a rare neoplasm that accounts for 5% of all soft tissue sarcomas.1 It the most common mesenchymal gastrointestinal tract. Before advent immunohistologic methods, spindle cell sarcomas tract were considered to be leiomyomas or leiomyosarcomas, with occasional examples neurogenic tumors. GIST defines distinct group tumors originate from intestinal cells Cajal. These act as regulators bowel peristalsis and therefore are also called pacemaker cells. Cajal normally express cKIT (CD 117), which tyrosine kinase growth factor receptor. This immunoreactivity best defining feature GISTs, distinguishing them true smooth muscle (i.e., leiomyosarcomas) arising neural crest derivatives schwannomas neurofibromas); this specific criterion diagnosis GIST. In addition, targeting receptor inhibitor [STI-571, imatinib (gleevec); Novartis, Basel, Switzerland] has been successfully utilized in treating patients

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