 Methodology: prospective, multidisciplinary, multi-center randomized controlled study. Control group: Rectal neoplasms undergoing elective surgery for laparoscopic abdominoperineal resection. Study group: Rectal neoplasms undergoing elective surgery for laparoscopic abdominoperineal resection with a lightweight mesh polypropylene and poliglecaprone 25. Sample size was calculated based on a proportion of parastomal hernia of 65 in the control group and 15 in the study group. With an α risk 0.05 and 1- β 0.8, 28 patients are required, 14 per group. Estimating a drop-out rate of 10, the final number will be 32 patients. The efficacy will be evaluated clinically at six months and abdominal CT will be performed at 12 months along with another clinical evaluation. 