Cervical dysplasia is the precursor of cervical cancer. LEEP and LLETZ are standard surgical procedures to treat cervical dysplasia. There is no direct head-to-head comparison between LEEP and LLETZ in the literature regarding oncologic safety, for which complete resection of the dysplastic lesion (so-called 'in-sano resection') is the most appropriate postoperative surrogate parameter. Further clinical studies are therefore useful to optimize surgical therapy for cervical dysplasia. The primary objective of the present study is to compare LLETZ (resection of the dysplastic lesion including the transformation zone) with targeted resection of the colposcopically conspicuous lesion only (LEEP) and to compare it with regard to oncological safety (defined as non-in-sano rate).