Case Report of Duodenal Diverticulum and Choledochal Cyst

Background Duodenal diverticulum and choledochal cysts are rare conditions that can cause upper abdominal pain, a common symptom associated with various foregut organs. Despite their rarity, accurate diagnosis is essential as these conditions can be easily misdiagnosed due to their similar computed tomography (CT) imaging features. Case presentation: Two cases were documented: one involving a 75-year-old male with a choledochal cyst located in the pancreatic head, initially presenting as a congenital choledochal cyst type II. Due to the cyst's deep location and small size, a pancreatoduodenectomy was performed, with postoperative confirmation of a congenital choledochal cyst. The second case involved a 59-year-old male with a duodenal diverticulum. Diagnostic imaging included CT and magnetic resonance imaging (MRI), leading to surgical resection of the diverticulum due to its large size, following unsuccessful inversion attempts. Postoperative pathology confirmed the diagnosis. Both patients recovered without complications and were symptom-free during follow-up. Conclusions These cases underscore the diagnostic challenges posed by similar imaging appearances. Conservative or minimally invasive approaches should be prioritized, with surgical intervention reserved for cases where less invasive methods have been exhausted. Multidisciplinary collaboration remains crucial.