Short stature is defined as any child who has a height below the 0.4th centile on a growth chart or less than 2 standard deviations below the mean for gender and age.
The majority of cases are variation of normal physiological growth such as familial short stature, constitutional delay and idiopathic short stature. A single point on a growth chart is not definitive of short stature. As a result, previous growth data and serial measurements should be plotted.
Pathological causes of short stature include genetic syndromes (Prader-Willi syndrome, Turner syndrome, Noonan syndrome), chronic diseases, and endocrine pathology.
Children’s whose heights fall within their expected adult height, and who are well, do not need further investigation.
A child’s mean expected adult height is calculated as follows:
Boy: The mean of the parents’ heights plus 7 cm.
Girl: The mean of the parents’ heights minus 7 cm.