Özet:

Osteosarcoma comprises 23% of head and neck malignancies. Studies show that 6% to 9% of all osteosarcomas are seen in the maxilla and mandible. In osteosarcoma in jaws, the survival rate is higher and the risk of metastasis is lower compared to osteosarcoma in the extremities. The gold standard in osteosarcoma diagnosis is computed tomography and magnetic resonance imaging. ‘Sunray appearance’ is a common radiologic finding of sarcomas. A 29-year-old male patient received to our clinic with pain and swelling in the right mandible. Extra-oral examination revealed that facial asymmetry and significant swelling in the right mandible. On the cone beam computerized tomography examination, a lytic, mixed lesion area was observed with conical shaped root resorption around the mandibular right second premolar and first molar tooth roots. Ultrasound examination revealed that thinning, expansion, and erosion of the buccal cortical bone and 'sunray appearance' in the mandible. Cone beam computerized tomography and ultrasound have become an important diagnostic technique for the evaluation of maxillofacial pathologies. Ultrasound imaging is a rapid technique that aids in the early and differential diagnosis of pathologies. Sunray appearance is a pathognomic finding for osteosarcoma. In present case report, diagnostic ultrasonography is the second case in the literature used in osteosarcoma of the mandible. Keywords: Cone beam computed tomography, jaw osteosarcoma, sunray, ultrasonography

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