Objective: Case presentation of bladder endometriosis during 2nd trimester imitating urinary bladder tumour.
Setting: Mother and Child Care Institute, Prague. III. Medical School of Charles University, Prague.
Case report: 25-years old patient, 2nd trimester of first pregnancy.
Treatment: Partial bladder cystectomy.
Result: Complete recovery succeded by term delivery.
Conclusion: Tumouriform endometriosis of urinary bladder successfully treated by partial cystectomy allowing normal term delivery.