<prompt> Organic causes of constipation in infant are all except-High fibre dietCystic fibrosisHypothyroidismAll  <response>: Ans is a i.e., High fibre diet Constipation in infants and children 3 Constipation is extremely common in pediatric population. o The vast majority of cases 90-95 are functional i.e. 90-95 have functional constipation with no organic disease. In 1-5 cases, the organic disease can be diagnosed as cause of constipation, i.e. only 1-5 have organic causes of constipation. o Organic causes of constipation are: i Intestinal: Hirschprung disease, Analrectal stenosis, Anal fissure, anteriorly displaced anal opening, strictures. ii Drugs: Narcotics, vincristine, Psychotropics. iii Metabolicendocrine: Cystic fibrosis, hypothyroidism, Panhypopituitrism iv Neuromuscular: Cerebral palsy, Psychomotor retardation, spinal cord lesions, Myotonic dystophy, Neuropathy or myopathy of GIT v Other causes: Low fibre diet, Milk protein allergy. 