The adenomatoid odontogenic tumor: an analysis of 57 cases in a black African population

PURPOSE: This study analyzed the findings in a large series of adenomatoid odontogenic tumors (AOT) in Nigerians. PATIENTS AND METHODS: Hospital records of all cases of AOT diagnosed at three teaching hospitals were reviewed and analyzed. RESULTS: Most of the tumors were intraosseous (central) (98.3%) and of the follicular type (75%). Females were more frequently affected than males (1.4:1), and patients in their second decade of life were most frequently affected (75%). Patients with follicular AOT were relatively younger (15.2 +/- 5.6 years) than those with extrafollicular tumors (20.9 +/- 13.8 years). However, males who presented with extrafollicular tumors (14.6 +/- 3.9 years) were relatively younger than their female counterparts (24.9 +/- 16 years). The maxilla was affected nearly twice as often as the mandible (1.8:1), and the canine tooth was frequently embedded in the tumor (76.9%). Although follicular tumors were most frequently located in the maxilla (76.3%), extrafollicular tumors were more commonly found in the mandible (69.2%). CONCLUSION: The distribution of this tumor in black Africans does not appear to be substantially different from that reported in caucasians.