Hepatic Steatosis and Pain

Clinical Presentation

• The majority (60-80%) of patients with chronic hepatic steatosis experience no symptoms whatsoever 1
• When symptoms do occur, they are typically nonspecific and may include abdominal discomfort, fatigue, nausea, and muscle pain, according to the American College of Radiology 1

Pathophysiology

• Simple hepatic steatosis (70-75% of NAFLD/MASLD cases) occurs without cellular injury or inflammation, which explains the absence of pain, as reported by the American College of Radiology 2, 3
• The liver capsule lacks pain receptors for stretch or fat accumulation alone; pain typically requires inflammation, rapid enlargement, or capsular distension from other causes, as noted by the American College of Radiology 2

Important Clinical Distinction

• Steatohepatitis (NASH) with inflammation and hepatocyte injury occurs in 25-30% of cases and may produce more symptoms than simple steatosis, according to the American College of Radiology 2, 3
• Progressive disease with fibrosis, cirrhosis complications, or hepatocellular carcinoma can cause pain, as reported by the American College of Radiology and Clinical and Molecular Hepatology 1, 2