Central (intraosseous) calcifying odontogenic cyst.

The central calcifying odontogenic cyst (CCOC) is an uncommon lesion. The present study reports 17 new cases of CCOC and analyses their clinical and histomorphologic features. The data revealed that CCOC were usually diagnosed in the second decade of life with an almost equal distribution between the maxilla and the mandible. Six of the 17 cases (35%) were associated with odontomas and 6 lesions (35%) were associated with unerupted teeth. Histologically, most of the lesions were unilocular cysts but at least one was multilocular and one was a mixed lesion - partially cystic and partially solid. Excision with long-term follow-up (up to 10 years) is the treatment of choice.