Figure 5. . Response to avapritinib in case 5.

(3A) In a patient with PDGFRA D842V mutation (patient E), maximum intensity projection image of ¹⁸F-Fluorodeoxyglucose (FDG) positron emission tomography/computed tomography (PET/CT) showing physiologic biodistribution in the brain, liver, kidneys and urinary bladder. (3B) Axial CT abdomen showing a heterogenous mass measuring 5.5 × 6.0 cm in the surgical bed in the gastro-hepatic region and a hypodense lesion in the segment IVB of the liver 2.1 × 2.0 cm with no significant FDG uptake in any of the lesions on fused PET-CT images, suggestive of partial response (3C).