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Pathology · single question

All are features of hypohidrotic ectodermal dysplasia EXCEPT:

  1. Y-linked inheritance
  2. Sparse or brittle hair
  3. Dry skin and anhidrosis
  4. More common in males than females
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Correct answer: A. Y-linked inheritance

HED most commonly = X-LINKED RECESSIVE (EDA gene) — NOT Y-linked. Males (XY) most severely affected; females (XX) carriers with mild features. Autosomal dominant/recessive forms also exist. Features: hypodontia/anodontia, anhidrosis, hypotrichosis, periorbital wrinkling, saddle nose, heat intolerance.

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