Pediatrics In neonatal cholestasis, if the serum gamaglutamyl–transpeptidase (gamma GTP) 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 gamaglutamyl–transpeptidase (gamma GTP) is more than 600 IU/L the most likely diagnosis is – ✓ Correct Answer: D. Biliary atresia