Fig. 3
From: Radiolucent lesions of the mandible: a pattern-based approach to diagnosis
Dentigerous cyst. a OPT, b axial CT with bone windows and c dentascan reconstruction. Unilocular well-defined radiolucent lesion (thick arrows) surrounding an unerupted tooth. Immediate vicinity of the mandibular canal (dashed arrow) to the impacted tooth. d Three-dimensional reconstruction, lateral view showing the relationship of the cyst (blue), the unerupted tooth (green) and the mandibular canal (red). The cyst is attached at the level of the tooth neck and surrounds the crown. e Surgical specimen. Characteristic attachment of the cyst at the tooth neck (arrows). f Histology (haematoxylin-eosin stain, original magnification 20×): non keratinising thin epithelial lining (arrow) without rete pegs. Fibrous wall (asterisks) almost completely devoid of inflammatory cells