Primary Ewing sarcoma of the calvarial skull. Two cases report

Primary Ewing sarcoma of the calvarial skull is very rare, found in less th an 1 % of the cases. Frontal and parietal convexities are the common sites of occurence. We report two cases of primary Ewing sarcoma of the skull (in 13- and 14-year-old boys, The first tumor involved the right temporal regi on and exhibited unclear osteolytic appearance oil skull x-rays while compu ted tonzography showed an extraaxial enhanced mass and bone sclerosis with spiculated periosteal reaction. In the second case, the tumor was temporopa rietal. Plain films demonstrated a large osteolysis and computed tomography revealed extensive bone destruction involving both the inner and outer tab les. In both cases, the C scan revealed extraaxial enhanced masses with int racranial and extracranial extension. Radial resection was performed. Adjuv ant chemotherapy was given and no reourrence or metastasis has occured two cars later.