Colorectal cancer (CRC) is a common clinical entity. A significant proportion of patients experience metastatic disease, typically in the form of lung and liver spread. We present the case of a CRC cancer patient with distant metastasis to the ureter, causing hydronephrosis. Ureteroscopy and biopsy confirmed the diagnosis and the patient was subsequently treated with percutaneous nephrostomy tube placement. Distant spread of CRC to the ureter represents an exceedingly rare phenomenon. This case highlights the importance of heightened index of suspicion for ureteral involvement in CRC when hydronephrosis is identified on staging or surveillance cross sectional imaging.
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