Keywords: 18[F]-FDG, 18[F]-fluorodeoxyglucose; CECT, contrast enhanced computed tomography; CT, computed tomography; Computed tomography; ITMIG, International Thymic Malignancy Interest Group; MRI, magnetic resonance imaging; PA, posterior-anterior; PET, positron emission tomography; Pleural thymoma; Positron emission tomography; RECIST, response evaluation criteria in solid tumors; ROI, region of interest; Radiological staging; X-ray.