<prompt> The most common facial abnormality in Gardeners syndrome:Ectodermal dysplasiaOdontomeMultiple osteomasDental cysts  <response>: GARDNERS SYNDROME AD Skeletal abnormalities, the most common of which are osteomas, are an essential component of Gardner syndrome. The osteomas are characterized by slow, continuous growth, and occur most frequently in the mandible, the outer coex of the skull and the paranasal sinuses. The angle of the mandible is a paicularly diagnostic site. 