Osteosarcoma in the Maxillary Canine Region: Report of a Case.
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概要
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Osteosarcoma is a very frequent and malignant osteogenic tumor with extremely destructive potential. Osteosarcoma is said to occur more frequently in the mandible than in the maxilla, and in the posterior region than in the anterior region of the jaw. Prognosis is thought to be poorer when occuring in the maxilla than in the mandible. We experienced a case of osteosarcoma occuring in the maxillary canine region.<BR>A 34-year-old female was referred to our hospital, complaining of a separation between the left upper canine and premolar teeth, and swelling of the palate in the same region.<BR>The dental X-ray film showed a radiopaque mass at the apex of the teeth.<BR>CT findings showed the mass to be of the same density as the soft and hard tissues around it. Bone scintigram revealed abnormal uptake in the left maxilla. Chest X-ray film showed no metastasis. Periphery and biochemical blood examination values were all within the normal range.<BR>Diagnosing the case as maxillary tumor, we removed a mass en-bloc for biopsy.<BR>Histopathological examinations of the first resected specimen indicated osteochondroma. During the follow-up period the swelling appeared in the same region again. The second biopsy specimen indicated signs of osteosarcoma or chondrosarcoma. Partial maxillectomy was performed, and since then, there has been no recurrence and no metastasis for more than 3 years.<BR>We reviewed 29 cases of osteosarcoma from 19 Japanese literatures published between 1981 and 1990. Twenty of the 29 cases of osteosarcoma were in the mandible and 9 in the maxilla. Only four case's were diagnosed as osteosarcoma in the initial clinical diagnosis. Twenty cases were diagnosed as osteosarcoma by biopsy, but other lesions such as osteochondroma, fibroma, fibrosarcoma, fibrous dysplasia, inflammatory granulation tissue, malignant fibrous histiocytoma and chondroblastoma were found through pathological diagnosis.<BR>It is occasionally difficult to diagnose osteosarcoma in clinical and pathological findings. Therefore, careful follow-up observations over a long period of time are essential.
- 特定非営利活動法人 日本口腔科学会の論文
特定非営利活動法人 日本口腔科学会 | 論文
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