A prospective epidemiological study on odontogenic tumours in a black African population, with emphasis on the relative frequency of ameloblastoma.
The persistent view in the literature is that the relative frequency of ameloblastomas is higher in the black population than in Caucasians. The aim of this study was to determine the relative frequency of all odontogenic tumours (OT) in a 100% black population and to compare our findings with those of previous studies. A prospective study was undertaken of all patients presenting with OT to all 16 Nigerian departments of oral and maxillofacial surgery over a 4-year period. The following data were obtained: patient demographics, delay to presentation, extent of the lesion, and histological diagnosis. Six hundred and twenty-two cases were studied. A slight male preponderance was observed (male to female ratio 1.17:1). Patients ranged in age from 5 to 89 years, with a peak incidence in the third decade. The relative frequency of OT was 0.99 per million and that of ameloblastoma was 0.76 per million. Ameloblastoma was the most prevalent OT (76.5%), followed by adenomatoid odontogenic tumours (5.6%), odontogenic myxoma (4.5%), and keratocystic odontogenic tumours (KCOT) (3.1%). The relative frequency of ameloblastoma among Nigerians was not different from frequencies reported previously among Caucasian and Tanzanian black populations. KCOTs were, however, rarely diagnosed in Nigerians as compared to the white population in the Western world.
Department of Oral and Maxillofacial Surgery, Obafemi Awolowo University, Ile-Ife, Nigeria. Electronic address: torera5265@yahoo.com.
F O
FO
Oginni
Department of Oral and Maxillofacial Surgery, Radboud University Medical Centre, Nijmegen, Netherlands.
P J W
PJ
Stoelinga
Department of Oral and Maxillofacial Surgery, Ahmadu Bello University Teaching Hospital, Zaria, Nigeria.
S A
SA
Ajike
Department of Oral and Maxillofacial Surgery, University of Benin Teaching Hospital, Benin City, Nigeria.
O N
ON
Obuekwe
Department of Oral and Maxillofacial Surgery, National Hospital, Abuja, Nigeria.
B Aluko
BA
Olokun
Department of Oral and Maxillofacial Surgery, Aminu Kano University Teaching Hospital, Kano, Nigeria.
R A
RA
Adebola
Department of Oral and Maxillofacial Surgery, Lagos University Teaching Hospital, Lagos, Nigeria.
W L
WL
Adeyemo
Department of Oral and Maxillofacial Surgery, University College Hospital, Ibadan, Nigeria.
O
O
Fasola
Department of Oral and Maxillofacial Surgery, University of Maiduguri Teaching Hospital, Maiduguri, Nigeria.
O A
OA
Adesina
Department of Oral and Maxillofacial Surgery, University of Port Harcourt Teaching Hospital, Choba, Nigeria.
B O
BO
Akinbami
Department of Oral and Maxillofacial Surgery, Federal Medical Centre, Umuahia, Abia State, Nigeria.
I O
IO
Iwegbu
Dental Services Department, Federal Medical Centre, Abeokuta, Nigeria.
S A
SA
Ogunmuyiwa
Department of Oral and Maxillofacial Surgery, College of Medicine, Ekiti State University Teaching Hospital, Ado-Ekiti, Nigeria.
O S
OS
Obimakinde
Department of Oral and Maxillofacial Surgery, Nnamdi Azikiwe University Teaching Hospital, Enugu, Nigeria.
C C
CC
Uguru
D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000564:Ameloblastoma / Q000453:epidemiology* / Q000208:ethnology*; D044383:Black People; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009232:Myxoma / Q000453:epidemiology / Q000208:ethnology; D009549:Nigeria / Q000453:epidemiology; D009808:Odontogenic Tumors / Q000453:epidemiology* / Q000208:ethnology*; D015995:Prevalence; D011446:Prospective Studies
adenomatoid odontogenic tumour; ameloblastoma; keratocystic odontogenic tumour; odontogenic myxoma; odontogenic tumours