When we think about the sites of metastasis of breast cancer, in addition to lymphatic nodes in the axilary region, we first examine: bones, lungs, liver, brain, but we never think about the possibility that metastasis of breast carcinoma can be in the bladder wall.
We report a case of urinary bladder metastasis from a primary breast cancer, the 58-years-old female patient who had hematuria and bilateral hydronephrosis. The prognosis of this rare disease is poor and similar like any MBC and average survival is 18 to 30 months.