Aberrant pancreas is a result of impaired embryogenesis. The clinical presentation varies and mimics different diseases. The diagnostics complexity makes specialists conduct the patients’ work-up more thoroughly. Chronic recurrent pancreatitis is one of pancreatic cancer risk factors. Tobacco and alcohol consumption significantly increases the risk of developing aberrant pancreas. The article presents a clinical case of a 37-year-old man with a 10-year history of chronic pancreatitis mainly highlighting the diagnostics of aberrant pancreas. The disease manifested with an episode of acute pancreatitis and pancreonecrosis treated in a hospital. Pancreatic pseudocysts were diagnosed four years later. However, only six years after, aberrant pancreas in stomach and cystic dystrophy of duodenal wall were diagnosed. Accurate diagnosis allowed tailored treatment and avoiding surgery.