@article{oai:sapmed.repo.nii.ac.jp:00008145,
 author = {渡邉, 健太郎 and 瀬尾, 善宣 and 伊東, 民雄 and 佐々木, 雄彦 and 中川原, 譲二 and 原, 敬二 and 福岡, 誠二 and 大里, 俊明 and 中村, 博彦},
 issue = {1},
 journal = {北海道脳神経疾患研究所医誌 = Journal of Hokkaido Brain Research Foundation},
 month = {Mar},
 note = {Chondromas and chondrosarcomas are rare cranial tumors that are reported to have similar clinical presentations and radiological features, but need to be treated differently. 36-year-old female, complaining of vertigo and morning headaches presented at our hospital, but had no neurological deficits. After completing a series of MRI scans, a giant tumor was evident in the middle fossa. As noted, chondromas and chondrosarcoma are radiologically very similar, if not identical, in appearance. In this case, the tumor was in fact initially diagnosed as a chondroma by histological staining, but after further examination of specimens, the diagnosis was revised, and finally found to be a chondrosarcoma. None of the MRI or CT features of these tumors appear to be useful for differentiating chondoromas from chondrosarcomas preoperatively. The former typically consists of normal cells. While the latter is generally able to be diagnosed due to the presence of either necrotic cells or cells while dividing nuclease. However, diagnosis can be very difficult due to the low number of irregular cells. Treatment in both cases typically involves resection or removal of the tumor. Due to the malign not use of the chondrosarcoma, radiotherapy or chemotherapy is undertaken after the operation. Given the radiological similarity of these two tumors, we should rely not only on diagnosis from MRI.},
 pages = {29--33},
 title = {中頭蓋窩に発生した巨大軟骨肉腫の一例},
 volume = {17},
 year = {2007}
}