Growth hormone deficiency (GHD) in children is a pathological condition characterized by insufficient synthesis of growth hormone (GH), which is produced by the pituitary gland. This hormone plays a key role in the regulation of growth and metabolism, and its deficiency can lead to serious disturbances in the physical development of the child, including decreased growth, low body weight, and changes in body composition. Clinical manifestations of GH deficiency can vary depending on age, time of onset of deficiency, and the nature of the pathological process, having a significant impact on the quality of life and physical condition of the child.
History of the disease and interesting historical facts
The history of growth hormone deficiency research dates back to the early 20th century, when the role of the pituitary gland in growth regulation was first recognized. In the 1950s, growth hormone itself was isolated from the human pituitary gland, but its production was associated with great difficulties and limited supplies. In 1985, a method for its synthetic production was developed, which opened up new horizons in the treatment of children with GH deficiency. Interestingly, a report on childhood cancer in the early 1980s found that some children receiving growth hormone had an increased risk of developing tumors, which subsequently led to strict controls on the use of this drug. Historically, the monitoring and diagnosis of GH deficiency was ineffective, and many children were left without appropriate care until the advent of modern treatments.
Epidemiology
Growth hormone deficiency in children occurs with a frequency of approximately 1 in 3,500–10,000 births. According to the World Health Organization, estimates of the prevalence of this condition show significant regional variations. In developing countries, the incidence of growth hormone deficiency may be higher, due to genetic factors, environmental conditions, and the state of the healthcare system. It is important to note that prevalence may change with age: deficiency is more commonly diagnosed in younger children, while manifestations may be less obvious in adolescents.
Genetic predisposition to this disease
Growth hormone deficiency can be caused by both congenital and acquired factors. Hereditary predisposition is important because certain mutations in the genes encoding growth hormone or its receptors can lead to the manifestation of this condition. For example, mutations in the GHRH (growth hormone-releasing hormone) gene or in the genes responsible for the secretion of GH can cause deficiency. It has been found that about 25-30% cases are hereditary, which requires genetic testing of family members, especially if there is a history of the disease.
Risk factors for the development of this disease
There are several risk factors that may contribute to the development of growth hormone deficiency in children:
- Heredity - the presence of diseases in parents or close relatives associated with growth hormone deficiency.
- Chemical factors - exposure to toxic substances during intracranial development or during pregnancy.
- Autoimmune diseases - Some autoimmune conditions can affect the functioning of the pituitary gland.
- Pathologies of the endocrine registration system - dysplasia, malformations and other structural changes in the pituitary gland.
- Infectious diseases - Viral infections suffered in childhood can affect brain development.
Diagnosis of this disease
Diagnosis of growth hormone deficiency requires a comprehensive approach, including:
- Main symptoms: slow growth, short stature compared to peers, body weight discrepancy, changes in height percentage.
- Laboratory tests: determination of growth hormone levels in blood serum, provocative tests to assess GH secretion.
- Radiological examinations: X-ray to assess the condition of bones and the size of the hands, MRI to assess the condition of the pituitary gland.
- Other types of diagnostics: functional tests to determine the secretion of other pituitary hormones.
- Differential diagnosis: exclusion of other endocrine disorders such as hypothyroidism or sex hormone deficiency.
Treatment
Treatment of growth hormone deficiency begins with establishing an accurate diagnosis and requires an individual approach. The main treatment areas are:
- General treatment: adjustments to lifestyle, diet and physical activity.
- Pharmacological treatment: use of synthetic growth hormone (somatropin) in the form of injections.
- Surgical treatment: If there are tumors causing GH deficiency, surgery may be required (eg, removal of a pituitary tumor).
- Other treatments: Hormonal therapy is sometimes used to correct other endocrine disorders.
List of medications used to treat this disease
The following drugs are used to treat growth hormone deficiency:
- Somatropin is a recombinant growth hormone used by injection.
- Thyroid hormones - in case of concomitant hypothyroidism.
- Androgens - to stimulate growth and increase muscle mass.
- Other medications - depending on concomitant endocrine pathologies.
Disease monitoring
Monitoring the condition of a child with growth hormone deficiency includes:
- Control stages: regular visits to an endocrinologist, dynamic assessment of growth and body weight.
- Prognosis: If therapy is started in a timely manner and all recommendations are followed, the prognosis is often favorable.
- Complications: risk of developing various metabolic abnormalities and disorders associated with deficiency of other hormones.
Age-related features of the disease
Growth hormone deficiency can have various age-related manifestations:
- In infancy: often results in growth retardation and low body weight.
- In preschool age: noticeable differences in growth between children, possible problems with social adaptation.
- In adolescence: growth retardation and problems with the development of secondary sexual characteristics.
Questions and Answers
- When should you suspect growth hormone deficiency in a child? If a child's growth is significantly below normal for his or her age, it may be a sign of a deficiency.
- How is growth hormone deficiency diagnosed? Diagnosis includes tests for growth hormone levels, X-rays and MRI to evaluate the pituitary gland.
- What is the treatment for growth hormone deficiency? The main method is the use of synthetic growth hormone in injections.
- Without treatment, what is the prognosis for a child with growth hormone deficiency? Without treatment, the risk of growth retardation and development of secondary sexual characteristics increases significantly.
- What are the side effects of growth hormone treatment? In rare cases, headaches, swelling and allergic reactions to injections may occur.
