Big Ideas,
Real Impact.

Section 1:

1. A newborn has a white forelock, different-colored eyes, and sensorineural hearing loss. What caused this condition?

🚨 WHAT ARE THEY REALLY ASKING?
• What disorder causes patchy pigmentation + deafness, and where do those cells come from embryologically?

🎯 ANSWER
• Abnormal neural crest development

🧠 WHY?
• This is Waardenburg syndrome.
• Neural crest cells become melanocytes, so defective migration/development causes pigment abnormalities and hearing loss.

Waardenburg = Melanocyte problem = Neural Crest problem. White forelock + heterochromia + deafness = Neural crest defect until proven otherwise.

SHOP NOW

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Big Ideas, Real Impact.

Big Ideas,
Real Impact.