Pediatrics In neonatal cholestasis, if the serum gamma glutamyl transpeptidase (GGT) is more than 600 IU/L, the most likely diagnosis is: A Neonatal hepatitis B Choledochal cyst C Sclerosing cholangitis D Biliary atresia 💡 Explanation In neonatal cholestasis, if the serum gamma glutamyl transpeptidase (GGT) is more than 600 IU/L, the most likely diagnosis is: ✓ Correct Answer: D. Biliary atresia