system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 5-day-old male newborn is brought to the physician by his mother because of yellowish discoloration of the skin for 1 day. The discoloration first appeared on his face and then spread to his trunk. There have been no changes in his bowel habits or urination. He was born at 38 weeks’ gestation via uncomplicated vaginal delivery. He is exclusively breastfed every 2–3 hours. Examination shows scleral icterus and jaundice of the face, chest, and abdomen. Laboratory studies show:
Hemoglobin 17.6 g/dL
Reticulocytes 0.3%
Maternal blood group A, Rh-negative
Fetal blood group 0, Rh-positive
Serum
Bilirubin, total 7 mg/dL
Direct 0.6 mg/dL
Free T4 7 μg/dL
Which of the following is the most likely diagnosis?"
assistant
Physiological neonatal jaundice