<prompt> Features of hypothyroidism in infancy include the following exceptPremature closure of posterior fontanelleCoarse faciesUmbilical herniaConstipation  <response>: Hypothyroidism characterized by wide open delayed closure of posterior fontanelle,umbilical hernia,large head,coarse facies,constipation. Reference : Ghai essential of pediatrics, eighth edition, p.no:517,table 17.6. 