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To determine the relative frequency of odontogenic tumors (OTs) in a Chinese population,files from the department of oral pathology,Peking University School and Hospital of Stomatology,were systematically reviewed for all OTs during the period 1985□ 2006.Diagnosis of each case was confirmed according to the WHO histological classification for OTs published in 2005.The relevant clinicopathological data of these OTs were analyzed and compared with those of previous series.The present series represents approximately 3.92% of all pathologic pecimens accessioned in our department over the same period of time.