Fig. 2.

A nine-year-old girl presented with pain in the right hip and thigh for two months: a) the anteroposterior pelvis radiograph shows an osteolytic lesion of the right pubic bone (ramus inferior ossis pubis). Iliac crest biopsy was consecutively performed and Ewing sarcoma was diagnosed; b) coronal MRI scans of the pelvis show a tumour mass extending from the os pubis and infiltrating the obturator externus muscle; c) and d) full body positron emission tomography MRI scans were performed to complete staging; e) full body MRI scan.