[Ewing's sarcoma of the jaw. The value of multidisciplinary management. Apropos of 4 cases].

Ewing's sarcoma is the second most common malignant bone tumor of childhood, yet it is a rare tumor. Primary maxillary localization is unusual and occur in only 1-2% of cases, mostly in the mandible. The prognosis of Ewing's sarcoma has been improving considerably since the introduction of combined modality treatment.

[Intra-masseter metastasis of a gastric adenocarcinoma].

We report a case of metastasis in the masseter muscle secondary to stomach carcinoma. Second neoplastic invasion in skeletal muscle is an exceptional phenomenon. And this frequency is paradoxical against corporeal muscular mass.