Open Access Open Badges Case report

An unsuspected ameloblastoma in the subpontic region of the mandible with consideration of pathogenesis from the radiographic course

CH Siar1, K Nakano2*, PI Chelvanayagam3, KH Ng4, H Nagatsuka5 and T Kawakami2

Author Affiliations

1 Department of Oral Pathology, Oral Medicine and Periodontology, Faculty of Dentistry, University of Malaya, Kuala Lumpur, Malaysia

2 Hard Tissue Pathology Unit, Matsumoto Dental University Graduate School of Oral Medicine, Shiojiri, Japan

3 Department of Oral Surgery, Faculty of Dentistry, University of Health Sciences, Phnom Penh, Cambodia

4 Formerly Unit of Stomatology, Cancer Research Centre, Institute for Medical Research, Jalan Pahang, Kuala Lumpur, Malaysia

5 Department of Oral Pathology and Medicine, Graduate School of Medicine, Dentistry and Pharmaceutical Science, Okayama, University, Okayama, Japan

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European Journal of Medical Research 2010, 15:135-138  doi:10.1186/2047-783X-15-3-135

Published: 30 March 2010


The purpose of this report is to document a case of unsuspected ameloblastoma involving the right man dibular subpontic region in a 38-year-old Cambodian female patient. This lesion was purportedly preceded by multiple radiolucencies which were diagnosed as radi cular cysts and treated a few times in the past years by enucleation followed by endodontic therapy of the affected teeth. Bridgework restoration of the partially edentulous area was performed. This case report de monstrates radiographic changes that occurred in the periods before and after the diagnosis of amelo blas to ma. The case may represent an example of radicular cysts and ameloblastoma occurring as a collision phenomenon, or the ameloblastoma may have arisen as a result of neoplastic transformation of the lining epi thelium in an inflammatory odontogenic epithelial cyst.

unsuspected ameloblastoma; cystic amelo blastoma; small ameloblastoma; radicular cyst; odontogenic cyst; neoplastic transformation