Cystic Expansile Lesions of the Jaw:Differential Diagnosis with CT / 实用放射学杂志

ABSTRACT

Objective To analyse CT features of cystic expansile lesions of the jaw.Methods CT features of 23 cystic expansile lesions of the jaw in 22 patients were retrospectively studied,the configuration and structure of the lesions were observed.Results There were ondontogenic cysts(n=11)including radicular cyst(n=3),dentigerous cyst(n=4)and keratotic cyst(n=5),ameloblastomas(n=6),ondontogenic adenomatoid tumor(n=1),cemento-ossifying fibroma(n=2)and firbrous dysplasia(n=2).The ondontogenic cysts were mainly unilocular in shape with distinct sclerosing margin,most of them contained teeth.Ameloblastomas mainly appeared as multilocular or lobulated in shape and markedly expanded growth with disruption of the adjacent cortex;cemento-ossifying fibroma and fibrous dysplasia were mainly solid tumors,ossifying fibromas often associated with calcification.Conclusion Plain CT scan is of important value in diagnosing cystic expansile lesions of the jaw preoperatively.