After 15 years of experience with Schrudde's slide-swing operation, the results of this method are evaluated. Indication has been examined in 911 cases, both as to localisation and etiology. Since the resulting scars are smaller than the circumference of the defect, this approach possesses considerable advantages over other methods. Its safety enables it to be applied where defects are very extensive. A first attempt is here made to analyse the method geometrically.