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Calcifying cystic odontogenic tumour (keratinizing and calcifying odontogenic cyst, Gorlin cyst, calcifying epithelial odontogenic cyst)  

This is not a common cyst and is most often found in association with an odontoma or an impacted tooth. It presents as a painless expansile lesion. Radiographically the lesion presents as radiolucencies with foci of opacifications. Enucleation is the treatment of choice.

Image	Caption
	Figure 1: CCOT. Radiograph of maxilla. Well-demarcated radiolucent lesion with divergence of roots and displacement of an impacted canine.