<prompt> Common presentations of juvenile HypothyroidismGrowth retardationMental retardation within 2 yearsDelayed pubeyUmbilical Hernia  <response>: Most common presentation of juvenile hypothyroidism is growth retardation. others include delayed skeletal maturation,delayed dental development,delayed pubey, myopathy and pseudohyperophy,enlarged sella,pseudomotor cerebri. Usually due to hormonal synthesis defect such as TPO or to c -erb A mutation PE : goiter, delayed maturation, testicular enlargementprecocious menarche NOT usually MR- recovery is general rule with thyroxine Reference: OP Ghai ,essential paediatrics ,8 th edition.page no 517 