Fig. 2
18F-fluorodeoxyglucose positron emission tomography-computed tomography examination. a 18F-fluorodeoxyglucose positron emission tomography-computed tomography performed in February 2017 shows neither abnormal hypermetabolic lesions nor lymph node swelling in the whole body except for the left upper abdominal lesion. b Axial 18F-fluorodeoxyglucose positron emission tomography-computed tomography view shows a solitary hypermetabolic lesion in the spleen