Unusual Metastasis of Pancreatic Adenocarcinoma Into the Bladder: Two Case Reports and Literature Review.

Abstract

We described two patients diagnosed with rare bladder metastasis (BM) from pancreatic adenocarcinoma, a prevalent neoplastic disease primarily associated with ductal adenocarcinoma. The overall prognosis for those patients with metastasis is very poor, with a 5-year survival rate of < 3%. The scarcity of cases in the literature makes this series a significant contribution as it presents the first documented instance of BM originating from pancreatobiliary ampullary cancer and a rare case associated with the Krukenberg tumor. Additionally, we extensively reviewed the literature on the infrequent metastasis of pancreatic cancer to the bladder and provided details of those nine previously reported cases. Given its unusual nature, this report highlights the importance of considering BM in patients with a history of pancreatic carcinoma who present with new-onset hematuria or upper tract obstruction, stressing the need for comprehensive evaluation and timely management.