A Rare Case of Ureteral Metastasis from an Occult Pancreatic Primary

Metastatic involvement of the ureter is one of the rare causes of ureteral obstruction, with most documented cases being identified postmortem.The ureter's anatomy contributes to its natural resistance against metastatic deposits.While malignancies originating in pelvic organs, like the prostate, cervix, and bladder, are the most frequent primary sources of these tumors, metastasis from a pancreatic primary is extremely rare, with only a few cases documented in the literature to date.A 54-year-old male presented with a ureteric stricture.Although initial biopsy revealed a chronic inflammatory stricture, subsequent investigation pointed towards adenocarcinoma originating from the pancreaticobiliary tract.Metastasis-related ureteral obstruction usually occurs a year after primary cancer diagnosis.It is rare for this obstruction to be the only sign of underlying malignancy.In case of an occult primary, positron emission tomography scans and immunohistochemistry are essential for accurate diagnosis.Whether the primary tumor is known or occult, ureteral metastasis indicates advanced disease and a poor prognosis.