Assessment of gastrointestinal stromal tumors with computed tomography following treatment with imatinib mesylate

Figure 3 NS pattern. Contrast-enhanced CT scan of abdomen obtained in a 39-year-old woman with metastatic GIST in the liver. A: Before imatinib treatment, a large subcapsular cystic lesion in the right hepatic lobe and a small amount of free fluid were noted; B: After 10 mo therapy, there were new, well-defined, homogeneous enhancing nodules adjacent to the gallbladder (arrow); C: After 13 mo therapy, there was a slight increase in size of the mentioned nodule (arrow).