A parathyroid adenoma is a benign tumor of the parathyroid glands, whose main function is to regulate calcium levels in the blood through the secretion of parathyroid hormone (PH). This tumor can lead to hyperparathyroidism, a condition in which there is an excess of PH in the body, which in turn causes hypercalcemia. Depending on the morphological structure, various types of adenomas are distinguished, among which the most common are mainly PH-producing cells. Adenoma can develop in one or more parathyroid glands, which complicates diagnosis and requires careful medical observation.
History of the disease and interesting historical facts
The history of the parathyroid glands and their pathology is closely linked to the development of knowledge about the endocrine system. The first descriptions of the parathyroid glands were made in the 19th century, but it was only at the beginning of the 20th century that scientists began to understand their function and importance for calcium metabolism. In 1925, the first successful surgical intervention to remove an adenoma was performed, which opened a new page in the treatment of this disease. An interesting fact is that the first experiments to study the function of the parathyroid glands were carried out on animals, which made it possible to establish their key role in the regulation of calcium metabolism. However, it was only at the turn of the 1960s and 1970s that doctors began to use active surgical intervention in cases of adenoma diagnosis.
Epidemiology
Parathyroid adenoma is a much more common pathology in women compared to men, the ratio is approximately 3:1. According to various epidemiological studies, the incidence of parathyroid adenomas varies from 0.5% to 5% among patients seeking medical care for various reasons, including osteoporosis and metabolic disorders. Most cases are diagnosed in patients aged 40 to 60 years, but cases are also observed in younger people. This pathology is most common in regions with high iodine consumption, which makes it significant for public health.
Genetic predisposition to this disease
There is evidence of a genetic predisposition to parathyroid adenomas, which may be associated with hereditary syndromes such as multiple endocrine neoplasia (MEN). In particular, MEN type 1 has an increased likelihood of developing parathyroid adenomas. Mutations in the MEN1 genes, which encode the protein menin, may increase the likelihood of developing these adenomas. Other mutations, such as in the CASR and RET genes, may also play a role in the pathogenesis of this disease, although their impact is still being actively studied.
Risk factors for the development of this disease
Among the risk factors that contribute to the development of parathyroid adenoma, the following can be distinguished:
- Heredity - the presence of a case of the disease among close relatives significantly increases the risk.
- Genetic mutations, including those associated with MEN.
- Age - The risk increases with age, especially after age 40.
- Gender - Women are more likely to develop this disease than men.
- Chemical factors - Exposure to certain chemicals, including solvents and pesticides, may increase the risk.
- Metabolic disorders such as chronic renal failure may contribute to the development of this pathology.
Diagnosis of this disease
Diagnosis of parathyroid adenoma includes several key stages and methods:
- Main symptoms: Patients are often diagnosed based on symptoms of hypercalcemia, such as fatigue, weakness, depression, headaches, and kidney stones.
- Laboratory tests: Determining the level of calcium and PG in the blood, as well as testing for phosphorus and creatinine, help establish the diagnosis.
- Radiological examinations: Ultrasound examination of the neck allows visualization of the size and structure of the parathyroid glands. In some cases, scintigraphy and CT are used for a more detailed examination.
- Other types of diagnostics: A fine-needle biopsy may be performed to obtain cells from suspicious nodules.
- Differential diagnosis: It is important to exclude other causes of hypercalcemia, such as malignancies, hypercalcemic syndromes, and other endocrine disorders.
Treatment
Treatment of parathyroid adenoma varies depending on the clinical situation:
- General treatment: Correction of calcium deficiency and correction of vitamin D levels in the presence of hypercalcemia.
- Pharmacological treatment: The use of bisphosphonates can help control calcium levels, but is an adjunctive treatment.
- Surgical treatment: The main method is considered to be parothyroidectomy, aimed at removing tumor tissue.
- Other types of treatment: In some cases, radiofrequency ablation or minimally invasive treatment techniques may be considered.
List of medications used to treat this disease
The following medications are used for medical management of parathyroid adenoma:
- Bisphosphonates (eg, alendronate)
- Calcitonin
- Vitamin D and its derivatives (eg, calcitriol)
Disease monitoring
Monitoring of patients with parathyroid adenoma includes regular examination of:
- Control stages: Regular blood tests for calcium and PG levels every 6 months if the clinical picture is stable.
- Forecast: With timely diagnosis and adequate treatment, adenoma has a good prognosis, but about 30% patients may experience relapses.
- Donkey complications: Potential complications include hypocalcemia, osteoporosis, and impact on quality of life due to hypercalcemia symptoms.
Age-related features of the disease
The course of parathyroid adenoma has its own characteristics in different age groups:
- At a young age (up to 30 years), cases of adenoma are rare, but can occur in the context of hereditary syndromes.
- Among middle-aged people (30-60 years old), the disease is diagnosed more often, and the symptoms are less pronounced than in older patients.
- In older people (over 60 years of age), symptoms may be more pronounced and the risk of complications increases; such patients require more careful monitoring and an individualized approach to treatment.
Questions and Answers
- What symptoms may indicate parathyroid adenoma? Symptoms may include fatigue, increased thirst, frequent urination, and bone pain.
- How is parathyroid adenoma treated? The main method of treatment is surgery, but pharmacological treatment can also be used to correct the condition.
- What is the prognosis for parathyroid adenoma? The prognosis is good in most cases with timely diagnosis and treatment, but relapses are possible.
- How often should follow-up examinations be performed after treatment? It is recommended to perform control tests for calcium and PG levels every 6 months.
- What is the risk of inheriting parathyroid adenoma? Hereditary risk increases with family history of the disease, especially within MEN syndromes.
