Since Single-Port surgery is a traditional laparoscopy-like technique, the cost of procedure is expected to be similar. Other than different ports and instruments (already present on the market), SPC and 4PC require the same laparoscopic equipment, largely available in every operative room. From this point of view, the study doesn't imply any supplementary expense. The follow up of both procedures is identical. It will consist in outpatient clinical meetings and doesn't require expenses for new material and devices. Cost for complications and hospital stay is supposed to be unchanged between the two experimental groups.