Piver‐Rutledge‐Smith (Piver 1974)	Extent of surgery
Class I: extrafascial hysterectomy	Identification of ureters to avoid injury Uterine vessels are resected and ligated close to the uterine isthmus Uterosacral and cardinal ligaments are not removed No vaginal portion is excised
Class II: modified radical hysterectomy (Wertheim)	Ureters are dissected in the paracervical tissues but are not separated from the pubovesical ligament Uterine arteries are resected and ligated beside and medial the ureter Uterosacral and cardinal ligaments are excised up to the medial half portions Vagina is excised up to the upper third level Pelvic lymphadenectomy
Class III: classical radical hysterectomy (Meigs)	Complete dissection of ureters from the pubovesical ligament except for the small part where the umbilical bladder artery is located to the level of their penetration into the bladder Uterine arteries are cut off at the origin Uterosacral and cardinal ligaments are resected as close to sacral insertion and pelvic side wall, respectively Vagina is removed up to the upper half level
Class IV	Class IV differs from the Class III according to the following issues; Complete dissections of the ureters from the pubovesical ligament Umbilical artery is sacrificed Vagina is removed up to the three‐quarters level
Class V	Class V differs from Class IV with the addition of the excision of a portion of the ureter or bladder which is involved by the tumour
Querleu and Morrow (Querleu 2008)	Extent of surgery
Type A: minimum resection of paracervix (extrafascial hysterectomy)	The position of ureters are determined by palpation or direct vision without freeing from their beds The paracervix is transected medial to the ureter but lateral to the cervix The uterosacral and vesicouterine ligaments are not transected at the distance from the uterus Vaginal resection is at a minimum, generally less than 10 mm without removal of the paracolpos
Type B: transection of paracervix at the ureter	B1	Ureters are unroofed and dissected laterally, permitting transection of the paracervix at the level of the ureteral tunnel The posterior and deep neural component of the paracevix caudal to the deep uterine vein is not resected At least 10 mm of the vagina from the cervix or tumour is excised
	B2	As described in B1 with additional removal of the lateral paracervical lymph nodes
Type C: transection of paracervix at junction with internal iliac vascular system	C1	Uterosacral ligament is transected at the sacral insertion Vesicouterine ligament is transected at the bladder Ureters are mobilised completely Vagina is excised at least 15‐20 mm from the tumour and the corresponding paracolpos is resected routinely WITH the preservation of the autonomic nerves
	C2	As described in C1 but WITHOUT the preservation of the autonomic nerves
Type D: Laterally extended resection	D1	Resection of the entire paracervix at the pelvic side wall along with the hypogastric vessels, exposing the roots of the sciatic nerve Total resection of the vessels of the lateral part of the paracervix
	D2	As described in D1 plus resection of the entire paracervix with the hypogastric vessels and adjacent fascia and muscles
GCG‐EORTC a (Mota 2008)	Extent of surgery
Type I	Simple hysterectomy
Type II: modified radical hysterectomy b	The uterus, paracervix and upper vagina (10‐20 mm) are removed after dissection of the ureters to the point of their entry to the bladder Uterine arteries are cut off and ligated Medial half of parametria and proximal uterosacral ligaments are transected
Type III: radical hysterectomy b	En bloc removal of the uterus with the upper third of the vagina along with the paracervical and paravaginal tissues Uterine arteries are cut off and ligated at their origin The entire width of the parametria is resected bilaterally The entire uterosacral ligament is resected
Type IV: extended radical hysterectomy b	Differs from Type 3, as three‐quarters of the vagina and paravaginal tissues are resected
Type V: partial exenterationb	Terminal ureters or segments of bladder or rectum are resected along with the uterus and parametria