Fig. 2

A 54-year-old male patient with history of sigmoid carcinoma treated surgically, followed by partial segmentectomy and RFA of hepatic metastatic lesions. On routine follow up the patient showed elevated CEA level. a Axial post contrast CT image of the liver showed well-defined hypodense area of coagulative necrosis (yellow arrow) with no evidence of pathological enhancement along its vicinity; Metallic sutures at the segmentectomy site distorting the image quality (red arrow) with no evidence of surrounding pathological enhancement could be detected as well. b Axial post contrast MRI image of the liver showed well-defined high T1 signal area of coagulative necrosis with no evidence of pathological enhancement along its vicinity (yellow arrow), metallic susceptibility artifact of the metallic sutures at the segmentectomy site distorting the image quality (red arrow) with no evidence of surrounding pathological enhancement could be detected. c Axial PET image of the liver and d axial fused PET/MRI image of the liver revealed FDG uptake with SUVmax 6 at the segmentectomy bed (green arrows) (proved to be metastatic activity) and no uptake at the ablated lesion (white arrows)