Posterior mediastinal Ewing sarcoma with multiple metastases on FDG PET/CT: a rare entity
Abstract Background Ewing sarcoma and peripheral primary neuroendocrine tumors are aggressive neoplasms which consist of small, round, blue cells of neuroectodermal origin.They usually arise from the skeleton and consist of genetic mutations EWSR1 in chromosome hoods-muzzles 22 and FL1 gene on chromosome 11.Extraskeletal Ewing sarcomas (EES) are ra