Condylus tertius (also known as third occipital condyle,median occipital condyle, or basilar tubercle) is an extremelyrare condition, named by Merkel in 1815.1 There are veryfew clinical studies of prevalence of condylus tertius in theliterature. In humans it is found in approximately 0.5% ofthe population and may exist as a discrete condyle or an isolated osseous element.