Introduction: Pancreaticoduodenal artery (PDA) pseudoaneurysms are an incredibly rare complication of pancreatitis in children. Pancreatic pseudocysts are also uncommon. We report the occurrence of both pathologies in a young male with recurrent pancreatitis. Case: We report a unique case of a 10-year-old male with recurrent pancreatitis and a known pancreatic pseudocyst, who presented with a bleeding PDA pseudoaneurysm. His history was significant for obesity, hypothyroidism and fatty liver disease. His first episode of pancreatitis was 7 months prior. An MRI at the time had demonstrated a 24mm pseudocyst in the head of pancreas. A surveillance MRI 6 months later demonstrated an increase in the size of the multiloculated cystic lesion, now measuring 34mm. He was admitted to his regional hospital shortly thereafter with haematemesis, following two weeks of epigastric pain and vomiting (lipase 145, Hb 110). An USS concerningly demonstrated internal flow within the cystic lesion, and he was transferred urgently to our centre. He remained haemodynamically stable. A CTA demonstrated a bleeding 22mm superior PDA pseudoaneurysm, partially contained within the known pseudocyst. He underwent urgent coil embolization of the pseudoaneurysm by interventional radiology. At 6 months follow-up, he has had one further episode of pancreatitis, but no recurrence of the pseudoaneurysm. Discussion: PDA pseudoaneurysms are an incredibly rare complication of pancreatitis, and demand urgent intervention. Possible aetiologies of the pseudoaneurysm in our case include erosion of the known pseudocyst into the PDA or an underlying unrecognised vascular anomaly.