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CASE REPORT
Year : 2017  |  Volume : 5  |  Issue : 1  |  Page : 19-21

CT and MRI of radiation-induced osteosarcoma of the mandibular ramus following radiotherapy for nasopharyngeal carcinoma: A rare entity


1 Department of Radiology, The Nippon Dental University Niigata Hospital, Niigata, Japan
2 Department of Pathology, The Nippon Dental University School of Life Dentistry at Niigata, Niigata, Japan

Correspondence Address:
Ichiro Ogura
Department of Radiology, The Nippon Dental University Niigata Hospital, Niigata
Japan
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/jomr.jomr_40_16

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Radiotherapy is the main treatment modality for nasopharyngeal carcinoma. However, ionizing radiation is itself a known carcinogen, and sarcomas can be a complication of treatment. Radiation-induced osteosarcomas in the head and neck are particular rare. Imaging studies of radiation-induced sarcomas in patients with head and neck carcinoma have been limited to case reports and relatively small case series. We report an unusual case of a radiation-induced osteosarcoma of the mandibular ramus following radiotherapy for nasopharyngeal carcinoma with computed tomography (CT) and magnetic resonance imaging (MRI). These findings can be helpful for differentiating osteosarcoma from other tumors of the mandible.


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