Pyloric Stenosis

Presenting age:  0-3 months
Vomit:  nonbilious, projectile
Findings:  males>females, olive shaped mass in epigastrium.  low Cl/ low K/ metabolic alkalosis.

Pathologic Neonatal jaundice

•  Includes any jaundice present at birth
• Levels of bilirubin must be greater than that of physiologic jaundice (12mg/dL for fullterm, 15mg/dL for preterm)
• Causes include:  breat milk, illness, hemolysis, metabolic, biliary atresia, and medications
• Metabolic casues:  unconjugated (crigler-najar, glibert's); conjugated (Rotor, Dubin-johnson)
• Biliary atresia: clay stools; get conjugated bilirubinemia
• medications: sulfa drugs that dislpace bili from albumin.

Physiologic neonatal jaundice

•  Physiologic jaundice is seen in 50% of normal infants.  
• Results from an incomplete maturation of liver (so, it is mostly unconjugated bilirubin)
• For it to be considered physiologic, has to be less than 12 mg/dl for a full-term and less than 15mg/dL for preterm infant.