[Extraskeletal pharyngolaryngeal Ewing's sarcoma. Apropos of a case].

The authors report on one case of pharyngolaryngeal extraosseous Ewing's sarcoma. This is a very rare tumor which preferentially has a paravertebral or retroperitoneal location. The difficult histological diagnosis is greatly facilitated by the use of tumoral markers. The treatment implemented consisted of a "conventional" Cisplatin 5 FU chemotherapy, which allowed an almost complete clinical recession after 3 courses, then of external radiation therapy. The evolution of these tumors still remains unpredictable. Regional metastases to the lymph nodes are rare, and they are usually remote and mainly pulmonary. Lastly, the merits of computed tomography for the follow-up of these intramural lesions of the larynx must be emphasized.