OSTEOSARCOMA IN THE TEMPOROMANDIBULAR JOINT

Osteosarcomas are rare bone tumors in the buccomaxillofacial region that mainly affect the body and angle of the mandible. However, cases in the temporomandibular joint are rarely found. This report describes a case of a 30-year-old male patient with facial asymmetry on the right side referring to a volume increase in the preauricular region associated with painful symptoms and evolution of 5 months. The physical evaluation showed absence of lymph node enlargement and the presence of trismus, which enabled intra-oral examination. Computed tomography multidetector revealed a mixed lesion with imprecise limits and osteogenic corticomedular and spinal formation extending through the lateral, medial, and posterior borders of the condyle and the upper half of the mandibular ramus. An incisional biopsy was performed followed by an anatomopathologic result of osteosarcoma. The patient was referred to an oncologist and died while awaiting treatment.