Fluorine-18-fluorodeoxyglucose positron emission tomography/computed tomography (18F-FDG-PET/CT) for detecting metastases of Ewing sarcoma

To determine the accuracy of 18F-FDG-PET/CT imaging for detection of metastases of Ewing sarcoma (lymph node, bone, bone marrow or lung) at first diagnosis.

This is a protocol.