Pediatric liver disease
Bile duct development
Growth and remodeling
Danzer E, Hoffman C, D'Agostino J, Ryan M, Gerdes M, Bernbaum J, Rintoul NE, Herkert LM, Peranteau WH, Flake AW, Adzick NS, Hedrick HL: Rate and risk factors associated with autism spectrum disorder in congenital diaphragmatic hernia. Journal of Autism and Developmental Disorders48:2112-2121, 2018.
Ryan M, Underkoffler L, Dutton J, Loomes K: Delayed Biliary Development Leads to Bile Duct Proliferation and Portal Tract Expansion in Mice Heterozygous for Radical Fringe and Jag1 Alleles. Poster Presentation, AASLD annual meeting Boston, MA November 2012.
Ryan JM: Vomiting, Splenomegaly and Asplenia/Hyposplenia. The Five Minute Pediatric Consult, 5th edition. Lippincott Williams and Wilkins, 2008.
Awards and Honors
2016, Fellow's Teaching Award Honor Roll
2015, Fellow's Teaching Award Honor Roll
2006-2008, CDHNF Young Investigator's Development Award
2006, 2nd place Komorov Competition-basic science
2004-2006, NIH Loan Repayment Program
Editorial and Academic Positions
2011, Journal of Clinical Investigation, Ad hoc reviewer
2010, Human Immunology, Ad hoc reviewer
Academic and institutional committees
2015-present, Chair of the GI ACGME program evaluation committee - PEC
2011-present, Division of GI, Hepatology and Nutrition Second Opinion Committee
Leadership and Memberships
Memberships in professional organization
American Association for the Study of Liver Diseases
American Gastroenterology Association
North American Society of Pediatric Gastroenterology, Hepatology and Nutrition
American Academy of Pediatrics
Patient Experience Ratings
About the Patient Experience Rating System
The Patient Experience Rating is an average of all responses to the care provider related questions shown above from our nationally-recognized Press Ganey Patient Satisfaction Survey. Patients that are treated in outpatient or hospital environments may receive different surveys, and the volume of responses will vary by question.
Responses are measured on a scale of 1 to 5 with 5 being the best score.
We are committed to true transparency. However, to ensure the comments are fair and correctly attributed, we review each one before posting to the website. We exclude entire comments that disclose patient's protected health information, are off-topic, or include other confidential or inappropriate content. Comments will appear on provider bios only if providers have a minimum number of comments.
Comments are shared internally for education purposes to ensure that we are doing our very best for the patients and families for whom we are privileged to care.
The comments are submitted by patients and families and reflect their views and opinions. The comments are not endorsed by and do not reflect the views of Children’s Hospital of Philadelphia.