Aim: The aim of the present study was to evaluate the investigation of incidence and radiological findings of gastrointestinal stromal
tumors (GIST) as a rare cause of abdominal mass, with current literature review.
Material and Methods: Between February 2011 and May 2016, a total of 4,443 patients who underwent abdominal multislice
computed tomography and magnetic resonance imaging due to the clinical indications for abdominal pain, abdominal swellingmass
were analyzed in our hospital. The retrospective cross-sectional study included forty-five patients, who were subsequently
diagnosed with GIST histopathologically.
Results: GIST was identified in 45 (1%) patients. Of the total 45 patients, 21 (47%) were men and 24 (53%) were female. The mean
age was 55 years, ranging from 35 to 73 years. As a result of radiological examinations, the tumor location was stomach in 22 cases
(49%), small intestine in 12 cases (27%) and colon in 9 cases (20%). The retroperitoneal localization was also found in 2 cases (4%).
The average size of the lesions ranged between 2 and 15 cm. Malignant degeneration and omental metastasis were seen in 11 (24%)
and 7 cases (16%) respectively.
Conclusion: GIST is a rare cause of abdominal mass with an incidence of 1% in our region. They are most commonly localized in
the stomach, rarely in the omentum/mesentery and retroperitoneum. The Malignant transformation is not frequent. Diagnosis and
evaluations of mass can be made successfully by radiological imaging modalities.
Key words: Gastrointestinal Stromal Tumors; Abdomen; Multislice Computed Tomography; Magnetic Resonance Imaging.
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