Hypoparathyroidism is an endocrine disorder characterized by decreased secretion of parathyroid hormone (PTH) by the parathyroid glands. This leads to calcium deficiency in the blood serum and increased phosphorus levels. The main function of PTH is to regulate calcium and phosphorus metabolism in the body, participate in vitamin D metabolism, and affect bone tissue. Deficiency of this hormone leads to various clinical manifestations, including muscle spasms, seizures, tetany, and other neurological disorders. It is important to emphasize that hypoparathyroidism can be both primary and secondary, occurring as a result of other diseases or after surgical interventions in the cervical region.
History of the disease and interesting historical facts
Hypoparathyroidism was first described at the beginning of the 20th century. In 1925, Professor K. B. Parizhsky, conducting research on endocrine diseases, noted that patients with hypoparathyroidism suffered from seizures and other neurological symptoms. Since then, specialists have conducted many studies that have helped to understand the mechanisms of the pathology and methods of its treatment. One of the interesting facts is that in the early 80s of the 20th century, surgical treatment methods were developed that helped many patients cope with this disease. Modern methods of diagnosis and treatment of hypoparathyroidism have significantly improved the quality of life of patients, reducing mortality associated with complications.
Epidemiology
The prevalence of hypoparathyroidism varies from 0.3 to 4 cases per 100,000 population according to different sources. The disease is most often observed in women, especially in the 30-50 age group. Secondary hypoparathyroidism is more common and is often caused by severe thyroid disease such as thyroiditis. According to studies conducted in several European countries, secondary hypoparathyroidism occurs in 10-25% of patients with severe prostate disease and in 30% of patients who have undergone thyroidectomy. This highlights the significant burden that hypoparathyroidism can impose on public health.
Genetic predisposition to this disease
Genetic predisposition to hypoparathyroidism is associated with mutations in several genes, the most well-known of which are GCM2 and CASR. Patients with primary hypoparathyroidism often have mutations in the genes responsible for the development of the parathyroid glands. In some cases, hypoparathyroidism can be a hereditary disease transmitted by an autosomal resistant principle. There are also rare hereditary forms, such as DiGeorge syndrome, which is characterized by insufficiency of the parathyroid glands and various developmental anomalies. Genetic research in this area continues, which allows us to better understand the mechanisms underlying the disease.
Risk factors for the development of this disease
There are several risk factors that contribute to the development of hypoparathyroidism:
- Surgery on the neck, especially thyroidectomy or surgery involving removal of lymph nodes.
- Autoimmune diseases such as polyglandular deficiency syndrome, which can affect the parathyroid glands.
- Infections or injuries that result in damage to the parathyroid gland.
- Certain genetic syndromes that increase the risk of developing parathyroid disease.
- External factors such as radiation exposure may also contribute to the development of the disease.
Diagnosis of this disease
When diagnosing hypoparathyroidism, it should be remembered that clinical manifestations may vary depending on the degree of PTH deficiency. The main symptoms may include:
- Muscle spasms and cramps, usually starting in the fingers and toes.
- Tingling and numbness in the lips and fingertips.
- A condition that worsens with stress or physical exertion.
- Signs of neurological disorders, including hyperactive reflexes.
Laboratory tests include:
- Serum calcium level determination – may be low.
- Phosphorus concentration measurement - often elevated.
- A test for PTH levels will be low or undetectable.
Radiological examinations are mainly aimed at assessing the skeletal system, since long-term hypoparathyroidism can lead to osteoporosis. Other diagnostic methods include electromyography to assess the neuromuscular junction. Differential diagnosis should be made with other conditions, including hypoparathyroidism caused by vitamin D deficiency or other endocrine disorders.
Treatment
General treatment of hypoparathyroidism includes supportive therapy aimed at eliminating calcium deficiency and maintaining normal phosphorus levels. Pharmacological treatment primarily involves the administration of calcium supplements, as well as vitamin D in its active form. It should also be taken into account that in some cases it may be necessary to use drugs that stimulate the secretion of PTH.
Surgical treatment may be appropriate in cases where hypoparathyroidism is a consequence of surgical interventions. Parathyroid transplantation may be indicated for some patients. In addition to drug therapy, physical therapy and dietary changes aimed at increasing vitamin D and calcium levels are also recommended.
List of medications used to treat this disease
- Calcitriol (active form of vitamin D).
- Calcium carbonate.
- Hydroxyhydroxide amine D3 (allosteric modulator).
- Thiamazole (for concomitant thyroid diseases).
Disease monitoring
Hypoparathyroidism monitoring should include regular control tests of calcium and phosphorus levels in the blood, as well as an assessment of symptoms. The prognosis of the disease depends on its form and the timeliness of diagnosis. With adequate therapy, patients can lead a virtually normal life, but there is a risk of complications such as osteoporosis and electrolyte disturbances. Patients with hypoparathyroidism are subject to constant monitoring by an endocrinologist.
Age-related features of the disease
In children, hypoparathyroidism may be more severe, including growth retardation and dental abnormalities. In older adults, the disease may be associated with higher risks of complications. In addition, postmenopausal women are more likely to develop osteoporosis, which requires special attention and monitoring.
Questions and Answers
- What are the main symptoms of hypoparathyroidism? The main symptoms include muscle spasms, numbness and tingling, convulsions, and the possible development of neuropsychiatric disorders.
- Can hypoparathyroidism be cured? It is not always possible to completely cure the disease, but adequate therapy can control symptoms and reduce the risk of complications.
- How long does hypoparathyroidism treatment last? Treatment may be lifelong, requiring ongoing monitoring of blood calcium levels and adjustments to therapy.
- Is it possible to live with hypoparathyroidism? Yes, most patients can lead normal lives with regular treatment and monitoring.
- What is the role of vitamin D in the treatment of hypoparathyroidism? Vitamin D plays a key role in calcium absorption and helps maintain calcium levels in the blood, which is especially important in cases of PTH deficiency.
Advice from Dr. Oleg Korzhikov
Patients with hypoparathyroidism should be attentive to their condition and follow some recommendations. It is important to maintain adequate levels of calcium and vitamin D, undergo regular examinations and monitor the dynamics of symptoms. In addition, it is worth avoiding stress and physical activity, which can worsen the condition. I remind you that each case is individual, and drug treatment should be selected with a qualified specialist.
