Gardner syndrome is a rare genetic disorder discovered by a college professor of genetics, Eldon Gardner in 1951. Since it's classified as a subtype of familial adenomatous polyposis, people who suffer from it may eventually develop colorectal cancer at a young age, according to the U.S. Department of Health & Human Services. This inherited disorder causes a defect in a gene that regulates protein production, namely adenomatous polyposis coli (APC). This defect in the APC gene allows certain cells to multiply in a disorderly manner. Gardner syndrome teeth are known as supernumerary teeth or additional teeth beyond the normal dentition. These extra teeth are often identified at a routine dental visit before the patient is aware that they have the disorder.
In addition to supernumerary teeth, other oral implications may also be present in Gardner syndrome. Osteomas (bone growing on bone) and odontomas (benign tumors comprised of multiple tooth components), can also be markers in this syndrome, notes a study in the International Journal of Medical Sciences (IJMS). Besides the oral signs, the other effects of this genetic mutation can be serious and life-threatening.