NCIt definition : A rare, autosomal recessive inherited disorder usually caused by mutations in the
THRB gene. It is characterized by a defective physiological resistance to thyroid
hormones, resulting in the elevation of thyroxin and triiodothyronine in the serum.;
Alternative definition : NICHD: Reduced response to thyroid hormones in the peripheral tissues and/or in the
pituitary gland.;