Odontogenic myxoma
Odontogenic myxoma is a rare benign tumour of the jaw and characteristically presents as a slow, painless, bony expansion with resultant facial deformity. It is most commonly associated with an unerupted tooth and probably arises from the mesenchymal portion of the tooth germ. The region between the molar and premolar is the site of the most common occurrence for multilocular lesions while the anterior portion of the mouth favors a smaller, unilocular variety. Patients afflicted with an odontogenic myxoma generally notice a painless, slowly enlarging expansion of the jaw with possible tooth loosening or displacement. As the tumor expands, it frequently infiltrates adjacent structures. Maxillary lesions frequently enter the sinuses while mandibular tumors often extend into the ramus