What tests are typically performed for a child who is short in stature?
When evaluating short stature in a child, a comprehensive, stepwise approach is essential to identify underlying causes—ranging from normal variants of growth to systemic disease or endocrine disorders. Initial assessment begins with a detailed history (including prenatal, birth, developmental, nutritional, and family history) and thorough physical examination (assessing height, weight, body proportions, pubertal stage, dysmorphic features, and signs of chronic illness). Accurate serial height measurements plotted on standardized growth charts are critical to determine growth velocity and pattern.
Laboratory testing is guided by clinical suspicion but typically includes: serum insulin-like growth factor 1 (IGF-1) and insulin-like growth factor binding protein 3 (IGFBP-3) to screen for growth hormone insufficiency; thyroid function tests (TSH and free T4) to rule out hypothyroidism; complete blood count (CBC) and inflammatory markers (e.g., ESR or CRP) if chronic inflammation or anemia is suspected; electrolytes, renal and liver function tests to assess for systemic disease; and celiac serology (tissue transglutaminase antibodies) in children with gastrointestinal symptoms or associated risk factors. In select cases—such as disproportionate short stature, skeletal abnormalities, or positive family history—genetic evaluation (e.g., chromosomal microarray, targeted gene panels, or exome sequencing) may be warranted.
Imaging plays a key role: bone age assessment via left hand/wrist radiograph helps determine skeletal maturation relative to chronological age and informs prognosis and management. Brain MRI is indicated only if clinical features suggest hypothalamic-pituitary pathology (e.g., headaches, visual field deficits, or multiple pituitary hormone deficiencies). Growth hormone stimulation testing is reserved for children with strong clinical and biochemical evidence of growth hormone deficiency—not as a routine screening tool—and must be interpreted in context with IGF-1, IGFBP-3, bone age, and growth velocity.
Referral to a pediatric endocrinologist is recommended for children with height < −2.0 standard deviations (SD) for age and sex, growth velocity < 5 cm/year (in prepubertal children), or any red flags such as decelerating growth, delayed puberty, or dysmorphic features. Early, targeted evaluation ensures timely diagnosis and appropriate intervention—whether nutritional optimization, treatment of underlying disease, or consideration of growth hormone therapy when indicated.