Volume 149, Issue 3, Pages 623-634.e8 (September 2015) High Prevalence of Nonalcoholic Fatty Liver Disease in Adolescents Undergoing Bariatric Surgery  Stavra A. Xanthakos, Todd M. Jenkins, David E. Kleiner, Tawny W. Boyce, Reena Mourya, Rebekah Karns, Mary L. Brandt, Carroll M. Harmon, Michael A. Helmrath, Marc P. Michalsky, Anita P. Courcoulas, Meg H. Zeller, Thomas H. Inge  Gastroenterology  Volume 149, Issue 3, Pages 623-634.e8 (September 2015) DOI: 10.1053/j.gastro.2015.05.039 Copyright © 2015 AGA Institute Terms and Conditions

Figure 1 Flow of Teen-LABS study participants excluded from and retained in final analysis cohort. Gastroenterology 2015 149, 623-634.e8DOI: (10.1053/j.gastro.2015.05.039) Copyright © 2015 AGA Institute Terms and Conditions

Figure 2 (A) Distribution of NAFLD and NASH, including subtypes of borderline NASH. (B) Prevalence and distribution of fibrosis in the cohort. Stage 1 fibrosis was most frequent, predominantly stage 1c (periportal only), followed by stage 1a (mild zone 3 only) and stage 1b (moderate zone 3 only). Stage 2 (mild/moderate zone 3 and periportal fibrosis) and stage 3 (bridging) were rare. No participants had stage 4 (cirrhosis). Gastroenterology 2015 149, 623-634.e8DOI: (10.1053/j.gastro.2015.05.039) Copyright © 2015 AGA Institute Terms and Conditions

Figure 3 (A) Venn diagram of genes differentially regulated between definite NASH and not NAFLD, and borderline NASH and not NAFLD. Section numbers inside red squares indicate gene sets shared between definite and borderline NASH that were used to generate the ontological network in (B). Ontological enrichments associated with gene lists built through comparison of definite NASH to borderline NASH are presented in (C). Relative expression values of genes associated with the ontologies in (C) underwent hierarchical clustering to generate heatmaps in (D). Asterisks denote genes previously reported to be associated with severe fibrotic NASH in adults.24 Gastroenterology 2015 149, 623-634.e8DOI: (10.1053/j.gastro.2015.05.039) Copyright © 2015 AGA Institute Terms and Conditions