| 19319643 |
Dell'Avanzato R, Carboni F, Palmieri MB, Palmirotta R, Guadagni F, Pippa G, Santeusanio G, Antimi M, Lopez M, Carlini M: Laparoscopic resection of sporadic synchronous gastric and jejunal gastrointestinal stromal tumors: report of a case. Surg Today. 2009;39(4):335-9. Epub 2009 Mar 25.
Multicentricity of gastrointestinal stromal tumors (GISTs) has been described only in patients with neurofibromatosis type 1 (NF1) or within the small intestine, and different pathogenetic mechanisms are involved. We report a case of synchronous sporadic gastric and jejunal GISTs, which were resected laparoscopically in a 67-year-old man. Immunohistochemical analysis revealed that both lesions were KIT (CD117)-positive, but that the gastric lesion was CD34-positive, whereas the jejunal one was Vimentin-, S-100-, and SMA-positive. Molecular analysis of mutations in KIT exons 9, 11, 13, and 17, and in PDGFRA exons 12 and 18 revealed the presence of a gastric sporadic GIST with a KIT mutation of the exon 11 and a jejunal sporadic GIST without KIT or PDGFRA mutations. To our knowledge, this is the first report of laparoscopically resected synchronous sporadic gastric and jejunal GISTs. |
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