J Pediatr Endocrinol Metab. 2025 Sep 29. doi: 10.1515/jpem-2025-0301. Online ahead of print.
ABSTRACT
OBJECTIVES: Noonan syndrome (NS) is a genetic disease characterized by dysregulation in the RAS/MAPK pathway. Affected individuals present peculiar physical features, short stature, and congenital cardiovascular defects. Autoimmune hepatitis is a chronic immunoinflammatory liver disease.
CASE PRESENTATION: A 17-year-old boy with NS due to PTPN11 gene variation and type 1 autoimmune hepatitis (AIH-1; biopsy proven) is described. A literature search on the association between NS and AIH1 showed additional two cases.
CONCLUSIONS: This report highlights the importance of monitoring patients with NS for signs of autoimmune diseases, mainly liver dysfunction. Precise mechanisms linking NS and AIH-1 remain unclear. Anyway, the dysregulation of the RAS/MAPK pathway may be involved. Periodic monitoring of transaminases and prompt evaluation with liver biopsy should be done to optimize diagnosis and treatment of people with NS.
PMID:41015786 | DOI:10.1515/jpem-2025-0301
