Pediatrics blog
Clinical teaching and practical ideas for your next study session.
After Testosterone for Delayed Puberty: Follow Testicular Growth
A short testosterone course can change voice, hair, and growth without proving the boy’s own pubertal axis has activated. Learn why testicular growth after treatment—not virilization alone—guides reassessment.
Pediatric Hypertension Boards: Read Renin and Aldosterone
Learn to derive the classic high-PRA/high-aldosterone renin-driven renovascular pattern and the low-renin/low-aldosterone pattern of Liddle syndrome—and why neither pair alone proves the diagnosis.
Pediatric Hypoglycemia: What to Draw Before Dextrose—and What Can Wait
The critical-sample decision is about timing: which blood and urine tests are most useful while glucose is low, which can follow, and when treatment must come first.
Infant Faltering Weight With Diarrhea: When Formula Dilution Isn’t the Whole Story
Diluted formula can explain inadequate calorie intake, but it should not end the workup when an infant also has persistent bulky stools or signs of nutrient deficiency.
Croup MCQs: Why Quieter Stridor Can Signal Worse Obstruction
For croup questions, judge the whole respiratory pattern—not stridor volume alone. Learn how to distinguish stridor at rest and increased work from fatigue, poor air entry, and impending failure.
Ketotic Hypoglycemia in Children: What High β-Hydroxybutyrate Can—and Can’t—Tell You
A high β-hydroxybutyrate level with suppressed insulin identifies a ketotic response to hypoglycemia, not its cause. Learn what the pattern supports, what it cannot rule out, and which parts of the child’s history change the next decision.
Neonatal Hyperammonemia: How Acid–Base Clues Shape the Differential
In a sick newborn with hyperammonemia, ketonuria helps—but it is not the diagnosis. Learn how acid–base status, anion gap, glucose, and lactate shift the differential.
CAH Genetics on Pediatrics Boards: What the 25% Risk Means
Learn what a 25% recurrence risk means in 21-hydroxylase-deficient CAH, which parental-genotype assumptions it depends on, and how to avoid confusing affected and carrier outcomes.
Why Pediatric Septic Arthritis Can Destroy Cartilage So Quickly
The key mechanism is a neutrophil-rich host response that drives protease-mediated cartilage damage. Follow the cascade to understand why prompt sampling, antibiotics, and source-control planning matter.
A Failed Neonatal Hyperoxia Test Does Not Diagnose CHD
A low PaO₂ after 100% oxygen can reflect cyanotic heart disease, PPHN, or severe lung disease. Learn why the hyperoxia test cannot settle the diagnosis—and what should happen next.
NOWS Signs on Pediatrics SAQs: Map the Domain to the Case
A NOWS domain-and-example short answer is an evidence-mapping task: retrieve the three sign domains, then use only findings actually described in the newborn. Practice the distinction without mistaking nonspecific clues for diagnostic criteria.
After an Abnormal Direct Bilirubin: Why a Normal Ultrasound Does Not Clear the Infant
At 2–4 weeks, a direct bilirubin ≥1 mg/dL is an urgent consultation signal, not a biliary-atresia diagnosis. Learn why stool color, GGT, bilirubin trends, and ultrasound refine the differential without safely ending the evaluation.