Fig. 11
From: Imaging biomarkers for evaluating tumor response: RECIST and beyond
18 F-fluorodeoxyglucose (FDG) positron emission tomography (PET) can predict early response in targeted therapy. A 53-year-old man was diagnosed with Hodgkin lymphoma at the left parotid gland. A Pretreatment CE axial CT imaging shows a 16 mm tumor mass at the left parotid gland (white arrow). B The SUVmax value of 3.0 in the target lesion (open arrow) was detected on a pretreatment PET-CT scan. C After five cycles of brentuximab vedotin, a tumor size of 13.5 mm (white arrow) was observed, showing a 16 % reduction in size. According to the RECIST 1.1, this is a non-responder. D However, posttreatment PET-CT scan shows good tumor response with 50 % reduction of SUVmax value (from 3.0 to 1.5) (open arrow)