Short Stature in Children

🧭 When to suspect

Short stature is conventionally defined as a height below the 2nd centile (−2 standard deviation score [SDS]) for age and sex on a UK–WHO growth chart. The great majority of short children are entirely well: the two commonest patterns are familial short stature (the child is short but tracking appropriately for their parents) and constitutional delay of growth and puberty (a slow-but-normal tempo with late puberty). The task in primary care is to separate these normal variants from the minority in whom short stature signals a chronic illness, an endocrine or genetic disorder, or psychosocial deprivation.

What drives growth changes with age, and this directs the history: in the first 2–3 years growth is mainly nutrition-dependent; from around 3 years to puberty it is driven by growth hormone and thyroid hormone; and through puberty the sex hormones and growth hormone produce the pubertal growth spurt.

Two principles matter more than any single reading: growth is a trend, not a point – a child can be growing abnormally while still on a ‘normal’ centile – and a child may be short simply because their parents are short. Both are judged by plotting serial heights and by comparing the child’s centile with the mid-parental centile.

Importantly, in the last two scenarios the child’s height need not be below the 2nd centile – crossing centiles downward, or being far shorter than the family pattern predicts, warrants assessment in its own right.

Source: RCPCH UK–WHO growth charts · BSPED Growth Disorders SIG