Although endometriosis is frequently encountered in females of reproductive age, bladder endometriosis is relatively rare, representing less than 1% of all endometriosis cases. One must take particular care, however, to define bladder endometriosis clearly as full-thickness detrusor lesions. Indeed, small implants and small nodules of the vesicouterine fornix cannot be considered as bladder endometriosis.
Donnez, J., Squifflet, J.-L., Donnez, O., & Jadoul, P. (2007). Bladder endometriosis. In Donnez Jacques (dir.) (ed.), Atlas of Operative Laparoscopy and Hysteroscopy (p. p. 85-91). Informa UK Ltd. https://hdl.handle.net/2078.5/64999