Head and Neck ImagingOsteosarcoma, head and neck
malignant tumour arising from bone forming cells. For a general description, see
osteosarcoma. About 6% of the osteosarcomas originate in the maxillofacial skeleton, the mandible being the most frequent site. There is a wider age distribution in maxillofacial osteosarcoma than in skeletal osteosarcoma which occurs predominantly in the second decade of life. On imaging, these neoplasms appear as mass lesions, causing osteolysis or mixed lyticsclerotic bone alterations. Within the
tumour, new bone formation is commonly seen (
Fig.1).
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a. Coronal T1-weighted spin-echo image. Large gadolinium-enhancing nasofrontoethmoidal mass lesion, showing intraorbital and intracranial extension; some inflammation in left maxillary sinus.
b. Corresponding coronal CT image (bone window) reveals extensive intratumoral densifications.
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Osteosarcoma, head and neck, Fig.1 (a) | | Osteosarcoma, head and neck, Fig.1 (b) | |