creation date: 2026-01-22 21:04
tags: Pathologies
Short Stature
Background
Definitions
Short stature refers to a height more than 2 standard deviations below the mean for age, sex, and population. Statistically, this is defined as the 2.3rd percentile.
Growth concerns represent a common pediatric presentation and requires carefuil evaluation to avoid over-treatment.
Etiology and Pathophysiology
The height of a child is largely determined by a set of genes inherited from their parents. It is also influenced by nutritional, hormonal, and environmental factors.
In many workups, children end up categorized as physiological short stature. This includes:
Familial short stature
- Final adult height <3rd percentile
- Consistent with parental height (MPH)
- No nutritional, hormonal, acquired, or known genetic causes
Constitutional delay of growth and puberty (CDGP) - Delayed growth and puberty
- Eventually reaches normal population normals and MPH range
Idiopathic short stature - Diagnosis of exclusion
- Likely related to epigenetics and unconfirmed genes
SGA infants - Typically experience catch-up growth by age 2
- Considered pathological if catch-up growth doesn’t occur
In cases of physiological short stature, the child is born with normal length but experience a deceleration in growth during first 2-3 years of life. Following the deceleration below the 2SD line, normal growth velocity continues.
Pathological causes are characterized by low height velocity.
Systemic disorders
- Undernutrition (under-intake, poor absorption, increased energy needs)
- Glucocorticoid therapy (even in absence of other features of Cushing)
- GI disease (Crohn’s, celiac) - greater weight deficit than height
- Rheumatologic disease
- Chronic kidney disease (growth hormone-related dysfunction)
- Cancer (caloric utilization/poor intake; radiotherapy may also interfere with hypothalamus/pituitary)
- Cystic fibrosis
- Heart disease (hypoxia, anorexia, and increased basal energy requirements)
- Immune disease (HIV)
Endocrine causes
Endocrine causes are characterized by excessive weight-for-height. - Hypothyroidism
- Growth hormone deficiency
- Precocious puberty
- Cushing syndrome
- Diabetes (poor control)
- Rickets as a result of hypocalcemia or hypophosphatemia
- Pseudohypoparathyroidism
Genetic diseases - Turner syndrome (shield chest, webbed neck)
- SHOX variants
- Prader-Willi syndrome (obesity and hyperphagia)
- Noonan syndrome (congenital heart disease, widely spaced eyes, low-set ears)
- Silver-Russell syndrome (FGR, body asymmetry, prominent forehead, triangular face)
- Skeletal dysplasias/growth plate abnormalities - disproportionate short stature
Clinical Presentation
Signs & Symptoms
Physiologic short stature may only present with proportionate low height or growth faltering.
Signs of underlying cause may be present in cases of pathologic short stature.
History & Physical Exam
Height and weight measurements should be plotted. An infantometer is used until age 2 followed by measurement against the wall. Mid-parental height can be used for reference of height potential.
Assess for systemic and endocrine illnesses, Tanner staging, and dysmorphic features.
Risk factors
Diagnosis
Criteria
Diagnosis of short stature is made if height is 2 SD or more below the mean of the sex and age.
Work-up
For children with short stature, normal height velocity (≥5 cm/yr), and otherwise asymptomatic:
- Bone age determination
- Celiac disease screening if first-degree FHx or GI symptoms
For children with ≤0.6th perceptile (severe), growth failure (crossing two major percentile line), or height velocity <5 cm/yr:
- CBC
- ESR/CRP
- Electrolytes, creatinine
- Bicarbonate, calcium, phosphate, ALP, albumin
- Celiac serologies
- TSH, T4, IGF-1, IGFBP-3
- Karyotype or chromosomal microarray for girls (r/o Turner)
Genetic testing may also be indicated if:
- Severe short stature (height below -3 SD)
- Multiple pituitary hormone deficiencies
- Severe growth hormone deficiency
- Unequivocal growth hormone insensitivity
- Children born small for gestational age who do not experience catch-up growth
- Additional congenital anomalies or dysmorphic features
- Evidence of a skeletal dysplasia
- Associated intellectual disability or microcephaly
Red Flags / Complications
Complications may stem from the underlying condition. Additionally, treatment may have side effects.
Management
Physiological Short Stature
In many cases, psychological counselling and reassurance is sufficient.
In cases of constitutional delayed growth and puberty, intramuscular testosterone depot (50-100mg monthly) or oral ethinyl estradiol (5-10 mcg daily) may be considered if the delayed puberty caused significant distress.
Pathological Short Stature
The underlying condition is treated.
In cases of endocrine causes (eg. growth hormone deficiency), consider referral to pediatric endocrinologist.