[Clinical and pathological analysis of jaw ameloblastomas in 890 patients].

PURPOSE: To investigate the clinical and pathological features of jaw ameloblastomas in 890 patients, in order to provide reference for clinical diagnosis and treatment.

METHODS: Eight hundred and ninty cases with jaw ameloblastomas treated in our department from January 2003 to June 2014 were retrospectively analyzed, including their gender, age, primary sites, pathological subtypes and therapies.

RESULTS: The age of patients ranged from 6 to 101 years old, with a mean age of 40.15 years. The distribution between males and females were 61.91% (551/890) males to 38.08% (339/890) females (1.62:1). 724 (81.35%) were located in the mandible, 166 (18.65%) were located in the maxilla. The occurrence of jaw ameloblastomas in this series of 890 patients was same in both sides of the jaw. Jaw ameloblastomas occurred in any parts of the jaw. Solid (378/890) and unicystic ameloblastoma (427/890) were the most common pathological subtypes. 414 cases underwent curettage, 212 cases underwent decompression, and 264 cases underwent mandibulectomy or maxillectomy.

CONCLUSIONS: Jaw ameloblastoma mainly happens in mandible and young people. Men are more vulnerable to suffer from than women. The most common sites are mandibular molar region and ramus. Curettage is the most commonly used treatment for ameloblastomas. Supported by Scientific Research Fund of Oromaxillofacial Head and Neck Surgery of Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine.