D Segre1, M Pozzo2, R Perinotti2, B Roche3. 1. Surgery Unit, Città di Bra Clinic, Strada Montenero 1, 12042, Bra, CN, Italy. diego.segre@gmail.com. 2. Department of General Surgery, Degli Infermi Hospital, Biella, Italy. 3. Proctology Unit, University Hospital, Geneva, Switzerland.