Posterior sagittal approach is very useful for the correction of anorectal malformations, but it can be used also for the treatment of pelvic or perineal masses. The authors present 3 patients affected one by a perineal hamartoma, one by a rectal duplication and one by a retrorectal cystic teratoma. All the patients were treated following the PSARP technique, using the Penã's bipolar electro-stimulator just in order to respect all the muscles of the anorectal sphincters. Using this procedure the authors were able to preserve the full anorectal continence in all the 3 patients.