[Differential diagnosis of tumors: plasma cell osteomyelitis--Ewing's sarcoma (author's transl)].

Radiographical changes of the left humerus, diaphysial, partly subcortical partly periostal suspect for Ewing's Tumor alarms the surrounding of a 15-year-old boy. By a rapid and exact examination as well as by an therapeutical punction the severe suspect of Ewing's Tumor could be eliminated. The tumore symptoms similarity of the plasmazellular Osteomyelitis is discussed.