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Pathology · single question

Which statement is NOT true of hypohidrotic ectodermal dysplasia?

  1. It features hypodontia and conical/peg-shaped teeth
  2. It is Y-linked
  3. It features hypohidrosis with heat intolerance
  4. It commonly shows an X-linked recessive inheritance pattern
Show answer and explanation

Correct answer: B. It is Y-linked

  • A. True — anodontia/oligodontia with conical anterior teeth is the hallmark oral finding.
  • B. Correct. No condition is Y-linked in this context — Y-linked inheritance would affect only males and be transmitted father-to-son exclusively, which is not the ED pattern.
  • C. True — absent or reduced sweat glands cause heat intolerance and hyperthermia.
  • D. True — the classic Christ-Siemens-Touraine form is X-linked recessive (EDA gene), so males are predominantly affected.

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