ABSTRACT
The authors try to call to mind the radiologic aspects of the Ewing Sarcoma and the interest of the medical imagery in the complete physical examination of extension and the supervision of this tumor. This is done through a retrospective study of4l cases collected during 7 years an a half which occurred in 35 children an 6 young adults. The age of the patients is between 6 and 36 years and the sex ratio is 1,9. For the diagnosis of S.E., the standard radiologic examination is generally sufficient, except for some atypical radiologic forms where the contribution of the other means of exploration is very helpful. So, the plat bones and short bones are reached in 51% of the cases. The osteolysis is found in all the patients of this series. It is associated to the osteo-condensation in 43% of the cases. The cortical is either broken or destincted in all the cases. The periosted appositions are plurilamellar and/or spicular like a [afire of herb] in 61% of the cases. The spur of Codman is present in 34% of the cases. The soft parts are invaded in 97% of the cases. These results confirm those of the literature, however the spur of Codman predominant in this series inherent to the delay of consultation of the patients. For the complete physical examination of the extension, .rather than the standard radiologic, the scanner, the NRM and the osseous scintigraphia are very helpful. For the search ofthe pulmonary metastasis, the thoracic radiography is indispensable but the detection of early metastasis still relative to the scanner. The supervision of the treated tumors is devoted to the standard radiography and especially the scanner which appreciates this regression permiting in irradiated cases, to distinguish the tumoral recidivism from the postradic fibrosis. This distinction can better be done with the NRM. The autors propose a decisional schema