Abnormalities of Stature in Pediatrics Complete Guide Causes Diagnosis Growth Disorders

Abnormalities of stature in pediatrics refer to height deviations where a child's height is significantly below or above the expected range for age and sex. Short stature is defined as height below the 3rd percentile or less than −2 standard deviations, while tall stature is height above the 97th percentile or more than +2 standard deviations.

Common causes include familial short stature, constitutional growth delay, growth hormone deficiency, hypothyroidism, chronic systemic diseases such as chronic kidney disease or celiac disease, genetic disorders like Turner syndrome, skeletal dysplasias such as achondroplasia, and chronic malnutrition.

Evaluation includes detailed history, physical examination, plotting height and weight on growth charts, assessment of growth velocity, calculation of mid-parental height, bone age assessment using X-ray of the left hand and wrist, and laboratory tests including thyroid function tests, IGF-1 levels, and growth hormone stimulation tests when indicated.

Constitutional growth delay is a normal variant where children grow at a slower rate and enter puberty later than peers. Bone age is delayed but growth velocity is normal, and affected individuals usually achieve normal adult height.

Familial short stature occurs in children with short parents. These children have normal growth velocity and bone age equal to chronological age, and their final adult height corresponds to their genetic potential.

Tall stature may be due to familial tall stature, endocrine disorders such as growth hormone excess or hyperthyroidism, early puberty, and genetic syndromes such as Marfan syndrome, Klinefelter syndrome, or Sotos syndrome.

Bone age is an estimate of skeletal maturity determined by X-ray of the left hand and wrist. It helps differentiate causes of abnormal stature, such as delayed bone age in constitutional growth delay or growth hormone deficiency and advanced bone age in precocious puberty.

Referral is recommended if height is below −3 standard deviations, growth velocity is less than 4 cm per year, there are dysmorphic features or disproportionate body segments, delayed puberty is present, or if an endocrine or genetic disorder is suspected.