Neftaly: Growth Hormone Disorders in Children
Overview
Growth hormone (GH) is a critical hormone produced by the pituitary gland that regulates growth, body composition, metabolism, and overall development in children. Disorders in GH secretion can lead to significant short- and long-term health consequences, affecting physical growth, psychosocial well-being, and metabolic health. Early recognition and management are essential to optimize outcomes.
Types of Growth Hormone Disorders
1. Growth Hormone Deficiency (GHD)
- Definition: Inadequate secretion of GH from the pituitary gland.
- Causes:
- Congenital: Genetic defects, pituitary malformations.
- Acquired: Tumors, trauma, infections, or cranial irradiation.
- Clinical Features:
- Short stature (height <3rd percentile)
- Delayed growth velocity
- Delayed bone age
- Immature facial features and increased adiposity
- Hypoglycemia in infants
- Diagnosis:
- Growth charts and physical examination
- GH stimulation tests
- IGF-1 levels
- MRI of the pituitary if structural cause suspected
- Management:
- Recombinant human growth hormone therapy
- Monitoring growth rate, IGF-1, and potential side effects
- Addressing underlying causes if present
2. Growth Hormone Excess
- Definition: Excessive GH production, usually due to pituitary adenomas.
- Manifestations in Children:
- Gigantism: Excessive linear growth before epiphyseal plate closure
- Coarse facial features, enlarged hands and feet
- Metabolic disturbances, including glucose intolerance
- Diagnosis:
- Elevated serum GH and IGF-1
- Oral glucose tolerance test (GH suppression test)
- Pituitary imaging
- Management:
- Surgical removal of pituitary tumor
- Medications (somatostatin analogs, GH receptor antagonists)
- Radiation therapy if surgery is not feasible
3. Idiopathic Short Stature (ISS)
- Definition: Height significantly below the population mean with normal GH secretion.
- Clinical Considerations:
- Typically normal growth velocity until later childhood
- Family history of short stature may be present
- Management:
- Careful evaluation to rule out GH deficiency or systemic diseases
- GH therapy in selected cases
- Nutritional and psychosocial support
Clinical Assessment
- Growth Monitoring: Plot height, weight, and BMI on standard growth charts regularly.
- History: Birth history, family height patterns, chronic illnesses, nutritional status.
- Physical Examination: Look for dysmorphic features, delayed puberty, or signs of systemic disease.
- Laboratory Tests: GH stimulation tests, IGF-1, thyroid function, cortisol, and other relevant hormones.
Complications of Untreated Disorders
- GH Deficiency: Short stature, low bone density, poor muscle mass, psychosocial challenges.
- GH Excess: Cardiovascular complications, insulin resistance, arthritis, craniofacial deformities.
Key Points for Healthcare Providers
- Regular growth monitoring is crucial for early detection.
- Differentiating between GH deficiency, excess, and idiopathic causes requires careful evaluation.
- Multidisciplinary management (endocrinology, nutrition, psychology) optimizes outcomes.
- Educate families on the importance of adherence to therapy and long-term follow-up.
References / Further Reading:
- Blum WF, et al. Growth Hormone Deficiency in Childhood: Diagnosis and Management. Endocrine Reviews, 2019.
- Savendahl L, et al. Consensus Guidelines for GH Therapy in Children. Horm Res Paediatr, 2016.
- Rosenfeld RG, et al. Disorders of Growth Hormone Secretion in Children. NEJM, 2020.


