Primary perihilar bile duct neuroendocrine tumor: a case report and review of the literature.

Neuroendocrine tumors represent a rare neoplastic entity, with even rarer occurrences within the biliary tract system. The pathogenesis of such conditions remains enigmatic. Clinical manifestations and radiological evaluations exhibit limited specificity, rendering preoperative diagnoses challenging. As of now, definitive therapeutic modalities remain elusive. Surgical excision stands as the paramount approach for managing biliary neuroendocrine tumors. A thorough preoperative assessment should precede the formulation of a judicious surgical strategy. Postoperative targeted adjuvant therapies hold promise in enhancing therapeutic efficacy and retarding tumor recurrence. This article chronicles a case study detailing a neuroendocrine tumor's diagnostic and treatment course within the perihilar bile duct. Integrating pertinent literature, it encapsulates the clinical attributes and diagnostic and therapeutic advancements in biliary neuroendocrine tumors. The aspiration is to augment awareness of this category of ailments, mitigating the occurrence of both missed and erroneous diagnoses, and furnishing a reference for forthcoming clinical endeavors.