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ENTER PROVIRO.COMGastrointestinal stromal tumor (gist) from sages surgical wiki jump to: navigation, search contents 1 overview 2 epidemiology 3 pathology 4 clinical presentation 5 non-surgical treatment 6 surgical treatment overview â€¢ gastrointestinal stromal tumor (gists) are the most common mesenchymal tumor of the gi tract and originate from the intestinal pacemaker cells, the interstitial cells of cajal. Viagra customer reviews can i buy viagra online yahoo answers It is distinguished from other mesenchymal tumors (e. Veilig online viagra kopen can buy viagra toronto G. howtosmudge.com/pjn-cheapest-viagra-online-pharmacy-hc/ Leiomyoma, schwannoma) through immunohistochemistry identifying markers of gist, which are equally expressed in interstitial cells of cajal: cd117 (kit) â€“ gene product of stem cell factor receptor proto-oncogene c-kit; cd34 â€“ hematopoietic progenitor cell antigen; pdgf receptor alpha (pdgfra) â€“ alternative and mutually exclusive oncogenic mechanisms to c-kit pathway. can buy viagra toronto Epidemiology â€¢ gists constitute 0. viagra without a doctor prescription 1â€“3% of all gi neoplasms. cheap viagra The estimated annual incidence is 10â€“15 new cases per million people or approximately 3,000 to 5,000 new cases in the us yearly. viagra for sale Although gists may occur at all ages, the peak incidence is in the sixth decade of life, with a slight male predominance. cheap viagra â€¢ more than half of gists start in the stomach 50-60%. best price for viagra Other locations include the small intestine 25â€“30% (ileum>jejunum>duodenal), colon/rectum/rectovaginal septum 2â€“10%, esophagus 9%. buy generic viagra Less common locations include retroperitoneal, pancreas, etc. viagra dosage take â€¢ up to 50% of gists are metastatic or multifocal at the time of presentation. cheap generic viagra Pathology â€¢ the malignant potential of gists is difficult to assess even after pathologic review. viagra for the brain modafinil â€¢ favorable prognostic factors include: gastric location, < 5 cm in diameter, mitotic index 5 mitoses per 10 hpfs, absence of necrosis, low proliferating cell nuclear antigen, ki-67 analogue index < 10%, confined tumor, lack of metastasis to other sites. can buy viagra toronto â€¢ unfavorable prognostic factors include: esophageal/colonic/rectal location, > 10 cm in diameter, mitotic index 10 mitoses per 10 hpfs, presence of coagulative necrosis, invasion of adjacent organs, evidence of peritoneal seeding or distant metastases. cheap viagra online Clinical presentation â€¢ gists can either be asymptomatic, found incidentally at the time of gi evaluation by either endoscopic or contrast studies, at operation, or may cause life-threatening symptoms. viagra for sale â€¢ symptoms are site specific and include: dysphagia for tumors of the e. buy viagra online Viagra viagra viagra better