[Diagnostic problems in Ewing's sarcoma]

Ewing's sarcoma presents diagnostic problems with several inflammatory processes (osteomyelitis, osteoperiostitis, eosinophilic granuloma) and other bone tumors. Clinical, radiographic and laboratory findings must be supported by a careful biopsy. Delimitation of reticulosarcoma and metastatic neuroblastoma is also extremely difficult from a histopathological point of view.