Gastroduodenal arterioportal fistula: Two case reports and review of literature

Figure 2 Case 2 preoperative imaging and angiography. A: Magnetic resonance cholangiopancreatography showing a 21 mm × 14 mm T1-hypointense lesion in the pancreatic head; B: Esophagogastroduodenoscopy revealed fresh blood adherent to the mucosa at the junction of the duodenal bulb and descending duodenum, without an identifiable ulcer or neoplastic lesion; C: Endoscopic ultrasonography demonstrating a well-defined hypoechoic mass in the uncinate process with prominent peripheral blood flow on color Doppler; D: Arteriography demonstrating the abnormal vascular network in the descending gastroduodenal artery (blue arrow) and the gastroduodenal artery (orange arrow).