At what ages should precocious puberty be considered in boys vs girls?
Girls -> 8 years of age
Boys -> 9 years of age
What is often the first pain crisis in patients with SCD <2 years of age?
Dactylitis
(as the pt ages, vasoocclusive crises usually affect the long bones, vertebrae, sternum, ribs, lower back, and abdomen)
At what point can a HBsAg+ mother start breastfeeding their newborn?
Immediately after birth
What electrolyte derangements are expected in infants with pyloric stenosis?
Hyochloremic hypokalemic metabolic alkalosis
- metabolic alkalosis and hypochloremia result from recurrent loss of gastric contents containing H+ and Cl
- volume depletion causes renal Na retention and K excretion -> results in hypokalemia
- contraction alkalosis contributes to renal Na losses
4 day old is found to have several macules with central pustules on an erythematous base on the cheeks, arms, and torso.
What is the likely diagnosis?
Erythema toxicum neonatorum

What recreational drug can cause galactorrhea in both boys and girls?
Marijuana
At what age should a full term infant start supplementation with iron?
Bonus: what about a preterm infant?
4 months
(bonus: 1 month)
What diagnosis should be suspected in a patient with 3-5 day prodrome of fever, malaise, headache followed by a macular and petechial rash that starts on the ankles, palms, soles and spreads centrally?
(bonus: what electrolyte abnormality is commonly seen?)
Rocky mountain spotted fever
(bonus: hyponatremia <130)

Patient presents with psychosis and evidence of liver injury. Exam of the eye is shown.

Wilson disease
During delivery, brachial plexus injury of C8-T1 can result in what deformity?
(Bonus: what about C5-C6?)
Klumpke palsy
Which 2 vaginal infections are associated with an elevated pH >4.5?
Bacterial vaginosis
Trichomonas
What is the inheritance pattern of G6PD deficiency?
X-linked recessive
Newborn is noted to have microcephaly, bilateral cataracts, multiple areas of scarring along a dermatome, and a shortened hypoplastic leg.
What is the most likely cause?
Congenital varicella syndrome

What should be suspected in an otherwise asymptomatic infant with painless gross bloody stools?
(bonus: how is it diagnosed?)
Meckel diverticulum
(bonus: technetium 99 scan - ectopic gastric tissue)
What syndrome is characterized by a spectrum of structural defects of the sacral region, lumbar region, spinal dysraphism, cord tethering, and bowel/bladder dysfunction in the newborn?

(bonus: what is the major maternal risk factor)
Caudal regression syndrome
(bonus: maternal diabetes)
What 3 electrolytes need to be monitored for refeeding syndrome? Are they increased or decreased?
Bonus: what is the mechanism?
Hypophosphatemia
Hypomagnesemia
Hypokalemia
What bugs should be covered with empiric abx for acute chest syndrome in patients with SCD?
(bonus: what abx?)
Pneumococcus
Mycoplasma
Chlamydia
(ceftriaxone, azithromycin)
What should he receive, if anything?
Tdap booster
(TIG indicated if unvaccinated or unknown status)
The presence of the following skin abnormality should raise concern for what underlying disease?

(bonus: what is this called?)
IBD
(bonus: pyoderma gangranosum)
What are the 4 neurotoxicity risk factors to consider in a baby with hyperbilirubinemia?
Gestational age <38 weeks
Albumin <3
Hemolytic disease
Sepsis
PCOS is often a clinical diagnosis but what 2 lab tests can help support it?
LH:FSH >2
Elevated testosterone
Infant solely drinks goat's milk. The peripheral smear is shown below. What deficiency should be suspected?

Folate deficiency
For measles PEP, what is recommended for a child <6 months of age who was exposed 3 days ago or less?
IGIM (or IVIG)
(if exposure >6 days ago then no PEP needed)
After cystic fibrosis, what is the 2nd most common cause of exocrine pancreatic insufficiency in children?
Shwachman-Diamond syndrome (SDS)
(growth faltering, recurrent infections, neutropenia and thromobocytopenia, and abnormal development of the growth plates)
What is the triad of renal vein thrombosis in the newborn period?
Gross hematuria
Unilateral or bilateral flank mass
Thrombocytopenia