Conization is a procedure in which a "cone" of tissue is removed. This procedure is performed for more advanced cervical dysplasia, which remains limited to the cervix (cervical intraepithelial neoplasia, high grade). It allows the surgeon to remove more cervical tissue. Conization is performed using either a knife, laser, or electrocautery. LEEP, or the loop electrosurgical excision procedure is the term used for conization electrocautery. In this procedure, an electric current is run through a loop of wire, which is used to perform the conization. It is the most common method used for conization.