Non-Alcoholic Fatty Liver Disease Activity Score

**Semantic type:** Intellectual Product

**Definition:** The histopathological evaluation of nonalcoholic fatty liver disease (NAFLD) and nonalcoholic steatohepatitis (NASH) based on the NAFLD scoring system. (Kleiner DE, Brunt EM, Van Natta M, Behling C, Contos MJ, Cummings OW, Ferrell LD, Liu YC, Torbenson MS, Unalp-Arida A, Yeh M, McCullough AJ, Sanyal AJ; Nonalcoholic Steatohepatitis Clinical Research Network. Design and validation of a histological scoring system for nonalcoholic fatty liver disease. Hepatology. 2005 Jun;41(6):1313-21.)

**Synonyms:** - NAFLD ACTIVITY SCORE - NAFLD Activity Score - NAS - NAS