Konishi K, et al. - The target of this analysis was to expound the clinicopathological features of chondroblastoma (CB) in Japan, and reliable clinicopathologic parameters speculating the local recurrence and/or metastasis. It was reported that only cyst formation in images appeared to be vital for predicting the recurrence free survival (RFS). Only age (≥16 years) and cyst formation served as substantial predictors for RFS, as noted by the Cox hazard analysis with representative clinico-radiological and pathological features. Pathological features did not appear to be prominent in both uni- and multivariate analyses.