The commonest cause of congenital hypothyroidism: September 2012: (A) Thyroid dysgenesis, (B) Pendred syndrome, (C) Defective iodine release, (D) Deficiency of de-iodinase
Answer is A. Ans. A i.e. Thyroid dysgenesis Congenital hypothyroidism Large & open posterior fontanelle, Absent social smile & eyebrows, Growth retardation, Delayed pubey, Cold extremities, Large tongue, Prolongation of physiological jaundice & Epiphyseal dysgenesis