Extended lateral pelvic sidewall excision (ELSiE): an approach to optimize complete resection rates in locally advanced or recurrent anorectal cancer involving the pelvic sidewall. - Shaikh, I.; Aston, W.; Hellawell, G.; Ross, D.; Littler, S.; Burling, D.; Marshall, M.; Northover, J.; Antoniou, A.; Jenkins, J. (Techniques in Coloproctology, 2015)