Anhidrotic ectodermal dysplasia affects:

 # A known case of anhidrotic ectodermal dysplasia is brought to hospital for treatment. Which area of the body do you find mostly affected in this case?
A. Spleen
B. Skin or ectoderm
C. Kidney
D. Thyroid gland

The correct answer is B. Skin or Ectoderm. 

The most commonly occurring ectodermal dysplasia is called as ‘hereditary hypohidrotic
(anhidrotic) ectodermal dysplasia’. This shows X-linked inheritance. 

Sex—males are affected more frequently than females.
Appearance—it is characterized by hypotrichosis, hypohydrosis and anhidrosis with saddle nose appearance.
Hairs—the hair of scalp and eyebrows tend to be fine, scanty and blond.

Frontal bosses- supraorbital and frontal bosses are pronounced.

Heat intolerance—skin is often dry, soft, smooth and scaly with partial or complete absence of sweat glands. Such patient cannot perspire and they usually suffer from hyperpyrexia and inability to endure warm temperature. 

Sibling appearance—facial appearance of these individual resemble to each other, enough to be mistaken for siblings.

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