In Juvenile Hypothyroidism developmental retardation is not as severe as that of cretinism and the symptoms of full-blown adult myxedema are rarely seen. Important features include:
- Delayed sexual maturation and puberty, as a result the child looks much younger than his age.
- Eruption of permanent teeth is delayed
- Intellectual performance is poor but mental deficiency is not as severe as cretinism
- Height is severely affected
- Maturation of facial bone is impaired as a result the nasal-orbital configuration (i.e. the shape and relative position of nose and eyes) of the infant or young child is retained.