[Bladder tumor, metastasis from breast carcinoma. A case report with literature review]

Breast cancer is the most common type of cancer amongst. Norwegian women. It spreads to various localisations, the most usual foci being lymphatic nodes, lungs, liver and bone. For a long time, metastatic breast cancer to the urinary bladder has been considered an extremely rare manifestation. We describe one case in which metastasis to the bladder from breast cancer caused clinically important symptoms. We discuss the pathophysiology, symptoms and diagnostic tools in regard to this rare phenomenon, and why bladder metastasis from breast cancer has become, and will continue to become increasingly important.