Managing the Expected, Diagnosing the Unexpected: A Rare Presentation of Undiagnosed Breast Carcinoma-A Case Report

Metastatic breast cancer (BrC) is a common condition. Primary metastatic sites are lung, liver, and bone. BrC rarely metastasizes to the bladder, and primarily at an advanced stage. We present an unusual case of BrC diagnosed in a woman presenting with gross hematuria and irritative voiding symptoms. Cystoscopy revealed a small benign-looking process at the bladder dome, biopsy was performed, and histology revealed metastatic lobular BrC. Further diagnostics confirmed the diagnosis and medical treatment was initiated. Gross hematuria should always be properly investigated, and bladder biopsies taken at the smallest suspicion, to avoid overlooking malignancy and secure the accurate diagnosis.