 Stafne defect is uncommon, and has been reported to develop anywhere between the ages of 11 and 30 years old, (although the defect is developmental, it does not seem to be present from birth, implying that the lesion develops at a later age).Usually the defect is unilateral (on one side only) and most commonly occurs in men.This entity was first described in 1942 by Edward C. Stafne.