[Primary intraosseous mucoepidermoid carcinoma of the jaws].

INTRODUCTION: A mucoepidermoid carcinoma (MEC) is a malignant salivary gland tumor. Its primitive intraosseous maxillary localization is rare. We report a case with a difficult diagnosis. CASE REPORT: A 42-year-old female patient consulted atypical right sinus area pain. The CT scan revealed a heterogeneous tumor lyzing the right maxillary. The surgical treatment was broad resection. The pathological examination indicated an intramaxillary MEC. The surgical treatment was completed by postoperative radiotherapy. DISCUSSION: Primary intraosseous MEC of the jaws is rare and often affects the mandible. Its intraosseous maxillary localization is even rarer. Its etiopathogenesis is still unknown. The treatment is usually surgical, and the prognosis is based on histological criteria.