Ameloblastoma: a multicentric study.
OBJECTIVE
The objective of this study was to supplement the current ameloblastoma database by reporting the clinicopathologic features of ameloblastoma from Asia and North America.


METHODS
Biopsy records of the participating institutes were reviewed for lesions diagnosed as ameloblastoma during the years 1993 to 2009. Slides were reclassified according to the World Health Organization Classification of Odontogenic Tumors in 2005. Clinical information and radiographic features were collected and analyzed.


RESULTS
The mean age of the patients ± SD was 38.27 ± 17.78 years; 662 patients (51.36%) were men. Mandible (84.26%) outnumbered maxilla and other locations combined in all countries. The number of multilocular radiolucencies (43.40%) was comparable with that of unilocular radiolucencies (42.04%). Follicular pattern was the most common histopathologic pattern (27.70%), followed by plexiform (21.10%) and unicystic pattern (20.71%), respectively.


CONCLUSIONS
The clinicopathologic features of ameloblastomas in the present study show some similarities with previous studies; however, minor differences exist.
Department of Oral Pathology, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand. fibroma123@yahoo.com
Kittipong
K
Dhanuthai
Soranun
S
Chantarangsu
Somsri
S
Rojanawatsirivej
Ekarat
E
Phattarataratip
Mark
M
Darling
Linda
L
Jackson-Boeters
Nasser
N
Said-Al-Naief
Hong-In
HI
Shin
Chang-Hyeong
CH
An
Nguyen Thi
NT
Hong
Phan Huynh
PH
An
Watcharaporn
W
Thosaporn
Aroonwan
A
Lam-ubol
Ajiravudh
A
Subarnbhesaj
D000328:Adult; D000367:Age Factors; D000564:Ameloblastoma / Q000150:complications / Q000453:epidemiology / Q000473:pathology*; D002170:Canada / Q000453:epidemiology; D005006:Ethnicity; D005260:Female; D006801:Humans; D008297:Male; D008339:Mandibular Neoplasms / Q000150:complications / Q000453:epidemiology / Q000473:pathology*; D008441:Maxillary Neoplasms / Q000150:complications / Q000453:epidemiology / Q000473:pathology*; D008875:Middle Aged; D015995:Prevalence; D056910:Republic of Korea / Q000453:epidemiology; D012189:Retrospective Studies; D017678:Sex Distribution; D013785:Thailand / Q000453:epidemiology; D014095:Tooth, Impacted / Q000150:complications; D014481:United States / Q000453:epidemiology; D014744:Vietnam / Q000453:epidemiology; D055815:Young Adult