@shilo, while we wait for members to reply, I’d like to list some information from Mayo Clinic, which you might find useful.
Mayo Clinic colorectal surgeons specialize in removal (resection) of complex tumors affecting multiple organs and structures in the abdomen and pelvis. The colorectal surgery practice at Mayo Clinic has particular expertise in procedures that help avoid the need for a colostomy and that preserve the nearby nerves that are essential for normal bowel, bladder and sexual function.
https://www.mayoclinic.org/diseases-conditions/rectal-cancer/diagnosis-treatment/drc-20352889
I also found two recent studies about factors that determine LARS, and bowel function following anterior resection, using the low anterior resection syndrome (LARS) score:
– https://www.ncbi.nlm.nih.gov/pubmed/29541896
– https://www.sciencedirect.com/science/article/pii/S101595841500086X?via%3Dihub