Unusual course of the aberrant right hepatic artery running through the pancreatic parenchyma during modified Frey's procedure.

We report a variation of an aberrant right hepatic artery arising from the superior mesenteric artery and crossing into pancreatic head without other hepatic artery substitution. The variant was discovered during radiological examinations in a patient with symptomatic chronic pancreatitis requiring Frey's procedure with reinsertion of the common bile duct into the pancreatic head. An aberrant right hepatic artery arising from the superior mesenteric artery is present in 10 to 20% of case and its course is usually retro-pancreatic. The course of this artery into the pancreatic head is uncommon and can be present up to 10% in case of ARHA. Knowledge of an aberrant right hepatic artery crossing into the pancreatic head is important before pancreatic surgery in order to avoid surgical complications, especially for liver necrosis.