Education and training, Cysts, Cancer, Education, Computer Applications-Detection, diagnosis, Computer Applications-3D, Ultrasound, MR, CT, Paediatric, Musculoskeletal bone, Musculoskeletal system
E.-L. H. J. Teo; Singapore/SG
Mandibular lesions are infrequently encountered in children. The purpose of this poster is to familiarize the reader with a wide range of these lesions and highlight the characteristic imaging findings of these lesions. Gross and histological specimens will be illustrated where available.
A radiological approach to the differential diagnosis of these lesions will be discussed. The differential diagnosis is important to guide further diagnostic work up,
biopsy and subsequent treatment.
- Odontogenic tumours are rare and benign in most cases.
there are often no clear distinctions between the odontogenic tumours but rather,
a transition from one to another.
- This is reflected in the radiological features of odontogenic lesions,
many of which have overlapping features.
- Several lesions of the jaw contain giant cells which may also pose a diagnostic problem.
- The biopsy site and method are important because lesions can be misdiagnosed on inadequate material.
Lesions of the mandible are classified into Odontogenic tumours and Non-odontogenic tumours. Odontogenic tumours are classified by their presumed tissue of origin; epithelial,
mesenchymal or mixed lesions. The latest WHO classification is as follows1:
The location of the lesion may provide a clue to the diagnosis2.
Teeth develop from Ectodermal cells (that further develop into ameloblasts and other outer tooth regions) and Ectomesenchymal cells (that form the odontoblasts and dental papillae). Odontogenic tumours develop from either or both of these elements2,3.