<prompt> The most common facial abnormality in Gardeners syndromeEctodermal dysplasiaOdontomeMultiple osteomasDental cysts  <response>: Ans. is c i.e. Multiple osteomas Osteomas is mandible and skull are the most common facial lesions in Gardner syndrome. Gardner syndrome is a variant of FAP characterized by: - Colorectal polyposis - Epidermoid cysts - Desmoid tumors - Osteomas - Thyroid neoplasms, and - Congenital hyperophy of the retinal pigment epithelium 