A case of osteosarcoma arising in the ethmoid sinus Rintaro Kawaguchi 1 , Nobusuke Hohchi 1 , Hiroki Koizumi 1 , Takahisa Tabata 1 , Shoji Ikezaki 1 , Azusa Takahashi 1 , Shigeru Nishizawa 2 , Hideaki Suzuki 1 1Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, University of Occupational and Environmental Health pp.61-65
Published Date 2016/1/20
DOI https://doi.org/10.11477/mf.1411200813
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 Osteosarcoma most commonly occurs in the limbs, but rarely arises in the head and neck. We report an extremely rare case of osteosarcoma in the ethmoid sinus. A 68-year-old man had suffered from right-sided nasal obstrucion for 5 months. He was found a pale-reddish mass in his right nasal cavity. CT and MRI revealed a moltilocular cystic lesion with ossification in the right ethmoid sinus extending to the anterior skull base. Endonasal biopsy showed the lesion was suspected to be a spindle cell tumor. The patient underwent resection of the tumor with skull base reconstruction via craniofacial and endoscopic endonasal approaches in cooperation with neurosurgeons. The histopathological diagnosis proved to be osteosarcoma, and he received postoperative radiotherapy of 60 Gy. The clinical course was uneventful, and the patient was currently free from disease for 15 months after surgery.

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