The commonest cause of congenital hypothyroidism: September 2012
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
Thyroid dysgenesis
Pendred syndrome
Defective iodine release
Deficiency of de-iodinase