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Gastrointestinal Stromal Tumors of the Stomach: CT Findings and Prediction of Malignancy

Hyo-Cheol Kim1, Jeong Min Lee1, Kyoung Won Kim2, Seong Ho Park1, Se Hyung Kim1, Jae Young Lee1, Joon Koo Han1 and Byung Ihn Choi1

1 Department of Radiology, Seoul National University Hospital, 28, Yongon-Dong, Chongro-gu, Seoul 110-744, South Korea.
2 Department of Radiology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, South Korea.



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  		Fig. 1. —45-year-old woman with benign gastrointestinal stromal tumor incidentally detected during routine checkup. Contrast-enhanced CT scan shows small well-defined endoluminal gastric tumor (arrow).

 


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  		Fig. 2. —42-year-old woman with malignant gastrointestinal stromal tumor presenting with epigastric discomfort. Contrast-enhanced CT scan shows well-defined endoluminal tumor (arrow) with central ulcer and overlying enhancing mucosa.

 


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  		Fig. 3. —72-year-old woman with malignant gastrointestinal stromal tumor incidentally detected during routine checkup. Contrast-enhanced CT scan obtained with patient in prone position shows well-defined exophytic tumor (arrows) with central low attenuation.

 


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  		Fig. 4. —48-year-old woman with malignant gastrointestinal stromal tumor presenting with hematemesis. Contrast-enhanced CT scan obtained with patient in prone position shows well-defined dumbbell-shaped tumor (arrows) with central cavity. Note large metastatic lesion (M) in liver.

 


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  		Fig. 5A. —59-year-old man with malignant gastrointestinal stromal tumor presenting with epigastric discomfort. Contrast-enhanced CT scan obtained during arterial phase shows huge heterogeneous mass with partially unclear margin. Note small high-attenuated metastatic nodule (arrow) in liver.

 


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  		Fig. 5B. —59-year-old man with malignant gastrointestinal stromal tumor presenting with epigastric discomfort. Contrast-enhanced CT scan obtained during portal venous phase shows huge heterogeneous mass (M) with displaced stomach (arrow). Note no obvious lesion in liver.

 

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