Tratamento cirúrgico de mixoma odontogênico: relato de caso

Abstract

Odontogenic myxoma is a rare benign neoplasm originated from odontogenic ectomesenchyma. It is locally aggressive and it has a tendency to recur even after more invasive surgical techniques, such as resection. This report about is patient I.I.S., 39 years old, female, who reports that 2 years ago she noticed a painless volumetric increase in soft tissue in the posterior region of the right mandibular body. Intermittent episodes of paresthesia associated with the region of innervation of the right inferior alveolar nerve began, which led the patient to seek dental care. On clinical examination, she presented mild facial asymmetry in the right mandibular region and an intra-oral tumor mass extending from the right retromolar trigone region and reaching the lingual region to oral floor, in addition to buccal expansion of the right mandibular body and mobility involving the teeth 44, 45 and 46. The histopathological report suggested that the lesion was an odontogenic myxoma. Thus, mandibular resection with safety margins and instalation of reconstruction plate of 2.7mm system of osteosynthesis were performed. Odontogenic myxoma is a benign neoplasm, not frequent, with slow growth, aggressive behavior and locally invasive characteristc. Thus, tumor resection with safety margins is the most used treatment and provides better prognosis.