Gastrointestinal stromal tumor (GIST) - gastric
Right upper quadrant pain with no obstructive jaundice. The ultrasound showed a solid mass in the left hypochondrium.
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There is a well-circumscribed soft tissue mass (8x5 cm) of interspleno-gastric location inseparable from the posterior gastric wall, of intermediate signal intensity on T1WI, and T2WI with central areas of high signal (necrosis). Subtle peripheral enhancement is noted, following IV contrast. On DWI it appears of high signal with low ADC.
A focal right diaphragmatic defect is noted with intrathoracic herniation of the hepatic dome and right colonic flexure, well-visualized on the coronal sequence.