Odontogenic Tumour is a term that encompasses a wide spectrum of lesions ranging from malignant (rare) and benignneoplasms to dental heamatomas, all arising from odontogenic apparatus, i.e; remnant of odontogenic epithelia and/or ectomesenchyme with variable amounts of dental hard tissue formed generally in the same sequence as normal tooth development. Distinction among the tumours may, in part depend on the embryologic stage of initiation and the histologic and gross appearance of the lesion at the age of clinical discovery.