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Clinicopathological profiles of 103 CB (80 male, 23 female) in extra\u2010craniofacial bones were retrieved. Numerical scoring of nine pathological and five radiological features was statistically analyzed to determine prognostic significance. Age ranged 8\u201361 years (average 19.6 years). Frequently involved sites were femur, tibia, calcaneus, patella and humerus. Radiologically, tumors were 2\u201380\u2009mm (average 31.1\u2009mm) in size. Marginal sclerosis and calcification were common. Histologically, pink cartilage, mitoses, and chicken\u2010wire calcification were often seen. Within a follow\u2010up period [2\u2013260 months (average 53.5 months)], the local recurrence rate was 15.5%. No patient had metastasis. Recurrence was most frequently observed at the femur. By log\u2010rank analysis, only cyst formation in images was significant for predicting recurrence free survival (RFS). By Cox hazard analysis with representative clinico\u2010radiological and pathological features, only age (\u226516 years) and cyst formation were significant predictors for RFS. Pathological features were not significant in both uni\u2010 and multivariate analyses.<\/jats:p><\/jats:sec>","DOI":"10.1111\/pin.12586","type":"journal-article","created":{"date-parts":[[2017,10,5]],"date-time":"2017-10-05T10:52:30Z","timestamp":1507200750000},"page":"495-502","source":"Crossref","is-referenced-by-count":30,"title":["Chondroblastoma of extra\u2010craniofacial bones: Clinicopathological analyses of 103 cases"],"prefix":"10.1111","volume":"67","author":[{"given":"Eiichi","family":"Konishi","sequence":"first","affiliation":[{"name":"Department of Pathology Kyoto Prefectural University of Medicine Graduate School of Medicine Kyoto Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yasuaki","family":"Nakashima","sequence":"additional","affiliation":[{"name":"Department of Diagnostic Pathology Kyoto University Graduate School of Medicine Kyoto 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