Pathology proven hepatic adenoma.

Hepatic adenomas are benign epithelial neoplasm:

• most commonly solitary (multiplicity may suggest hepatic adenomatosis)
• richly vascular tumor which frequently contains hemorrhage and necrosis
• pseudocapsule derived from compressed/collapsed hepatic parenchyma
• histological hallmark are clusters of benign hepatocytes arranged in sheets or cords with absent bile ducts
• Adenomas have variable lipid content ranging from
  • microscopic fat (detected in up to 77% with chemical shift MR) to
  • macroscopic fat (detected at CT in up 7%)

90% of hepatic adenomas occur in women. Associations with

• oral contraceptive use
• anabolic steroids
• glycogen storage disease (Type 1a)