Table 3.

Structured reporting template for magnetic resonance imaging endometriosis

	Structures involved	Findings to be reported
Anterior compartment	Urinary bladder	Size, number, and location/s of the lesion/s The extent of detrusor muscle involvement Involvement of trigone Distance of lesion from the ureteral orifice
	Ureters	Side involved Size of lesion Extrinsic/intrinsic involvement: Distance of lesion from VUJ Upstream hydronephrosis
	Anterior compartment spaces	Prevesical space	Obliterated/Not obliterated
		Vesicouterine space
		Vesicovaginal space
Middle compartment	Uterus	Dimensions Homogeneity Endometrial thickness and homogeneity Adenomyosis present or not Presence of infiltrating endometriosis (anterior or posterior wall, depth of extension, and distance from endometrium)
	Ovaries	Location (normal/displaced) Dimensions Adhesions: Presence of endometrioma (if present, the number and size of lesions, appearance on T1, T2, and diffusion)
		Diameter of tubes Contents (hydrosalpinx/hematosalpinx)
	Fallopian tubes
	Vagina	Superficial or full-thickness involvement: Position of the posterior vaginal fornix
Posterior compartment	Rectosigmoid	Size and number of lesion/s, distance of most caudal lesion from anal verge, depth of invasion and percentage circumference of bowel involved
	Uterosacral ligaments	Thickening/nodules
	Rectocervical and rectovaginal space	Obliterated/non-obliterated
Other extrapelvic sites	Gastrointestinal system	Stomach, small bowel, ileocecal junction, appendix, caecum, ascending and descending colon Describe length, size, depth of invasion
	Extraperitoneal endometriosis	Extraperitoneal endometriosis: anterior abdominal wall, pelvic floor, previous scars Describe the size, location, and extent of involvement