1999 Volume 45 Issue 11 Pages 709-711
We report a case of calcifying odontogenic cyst (COC) associated with odontoma, which occurred in the mandible of a 51-year-old woman. The lesion showed a single radiolucent area wiht an odontoma-like radiopaque mass on radiographs. It was shaped like a gourd. We classified reported cases of COC with odontoma, including our case, into two types on the basis of the relationship between the location of the cyst and odontoma. Type I is an odontoma in a cyst, and type II is an odontoma outside a cyst. Based on this classification, we analysed 27-cases of COC with odontoma reported in the Japanese literature. The analysis indicated the following results.(1) Twenty cases were classified as type I and 7 cases as type II.(2) The mean age of patients with type I was younger than that of patients with type II (3) Impacted teeth were present in 15 of 20 type I cases and 1 of 7 type II cases.(4) Type II odontomas were larger than type I, but cysts were of various sizes in both types. Our results indicate that differences in the positional relationship between COC and odontoma may be caused by patient age and growth rate of the odontoma.
