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 GASTROINTESTINAL - ORIGINAL ARTICLE
Year : 2011  |  Volume : 48  |  Issue : 4  |  Page : 466-470

Clinicopathologic spectrum of gastro intestinal stromal tumours - Experience at a tertiary care center


Department of Pathology, St.John's Medical College and Hospital, Bangalore, India

Correspondence Address:
I Y Kalegowda
Department of Pathology, St.John's Medical College and Hospital, Bangalore
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0019-509X.92281

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Context: Accurate diagnosis of Gastrointestinal stromal tumors (GISTs) and categorization of risk groups is crucial in the wake of targeted drug therapy. Aim: This study was undertaken to obtain insight into the clinicopathologic features of GISTs. Materials and Methods: Retrospective study of 20 cases of c-KIT (CD 117) positive GISTs .Various histologic parameters were studied. Immunohistochemical panel included CD-34, Smooth muscle actin, S-100, Desmin, and Vimentin. Risk categorization was done as per standard protocol. Clinical details and follow up were retrieved from cases files. Results: Of the total 20 cases, 15 were males. The mean age of presentation was 52 years. 50 % of the cases presented with gastro intestinal bleeding .The cases were categorized as high risk (60%), intermediate risk (20%), low risk (15%) and very low risk (5%). Stomach and small intestine were commonly involved and in 6 of the cases there were metastatic nodules in the mesentery/omentum/ peritoneum. Spindle cell morphology was the commonest histological pattern (55%). Nuclear pleomorphism, perivascular whorling, mucosal and fat invasion were seen only in the high risk group. CD-34, SMA and S-100 were positive in 90%, 30%, and 10% of the cases, respectively, with consistent Desmin negativity. Conclusions: Cases of GISTs in our clinical setting presented a decade earlier and mostly belonged to the high risk group. Certain histological features such as necrosis, and perivascular whorling were more commonly associated with the high risk groups.






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