Table 3.

Waaldijk and Goh fistula classification systems

Classification system	Type and / or description of fistula
Waaldijk 199529	Classification	Size
	Type 1 Not involving the closing mechanism	Small <2 Medium 2-3
	Type 2 Involves closing mechanism	Large 4-5
	A  Without (sub)total urethra involvement	Extensive> 6
	B  With (sub)total urethra involvement
	a  Without circumferential defect
	b  With circumferential defect
	Type 3 Ureteric and other exceptional fistula
Goh 200430	Type: distance from fixed reference point
	Type 1 Distal edge of the fistula >3.5 cm from external urinary meatus
	Type 2 Distal edge of the fistula 2.5-3.5 cm from external urinary meatus
	Type 3 Distal edge of the fistula 1.5-<2.5 cm from external urinary meatus
	Type 4 Distal edge of the fistula <1.5 cm from external urinary meatus
	Size: largest diameter in centimetres
	a  Size <1.5 cm in the largest diameter
	b  Size 1.5-3 cm in the largest diameter
	c  Size >3 cm in the largest diameter
	Special considerations
	i.  None or only mild fibrosis (around fistula and/or vagina) and/or vaginal length  >6cm, normal bladder capacity
	ii.  Moderate or severe fibrosis (around fistula and/or vagina) and/or reduced  vaginal length and/or bladder capacity
	iii.  Special circumstances, e.g. post-radiation, ureteric involvement,  circumferential fistula, previous repair