Abstract
The article presents information about the clinical manifestations, diagnosis and treatment of bladder endometriosis. The issues of etiology and pathogenesis of endometriosis are considered in detail. The classification of extragenital endometriosis is given. Information about the prevalence of endometriosis of the urinary system is given. A clinical observation of a patient with endometriosis of the bladder that developed after surgery on the pelvic organs is presented.