[Metastasis of breast carcinoma in the ureter. Presentation of a clinical case.].

Objective: To assess the importance of long-term close follow-up in patients with breast carcinoma.

Materials And Methods: To present a case report.

Results: A case of a 55-year-old woman with history of lobular carcinoma of the breast is presented. She received neoadjuvant treatment, surgery and complementary chemotherapy and radiotherapy. In radiologic imaging studies, multiple bone metastases were diagnosed. The patient consulted for left lumbar pain. Radiologic studies revealed left hydronephrosis secondary to soft tissue lesion in pyeloureteral junction with renal functional impairment. A biopsyperformed using an endoscopic approach (ureteroscopy), diagnosed a metastasis of breast carcinoma in the ureter.

Conclusion: Metastatic lesions in the ureter are extremely rare, even less frequent the ones with breast origin with around ten cases published worldwide. With the previous diagnosis of breast carcinoma, the probable ureteral compromise should be considered especially in patients with clinical and radiological symptoms of urinary tract obstruction. A well-timed and proper diagnosis may influence in prognosis and survival.