Mesothelioma

Mesothelioma is a rare and aggressive type of cancer that arises from the mesothelial cells that form a protective lining around internal organs such as the lungs, heart, and abdomen. The most common type of mesothelioma is pleural mesothelioma, which is associated with asbestos exposure, but peritoneal and pericardial mesothelioma can also occur. The disease is difficult to treat and has a high mortality rate. Diagnosis is often difficult due to the lack of specific symptoms in the early stages. The pathogenesis of the disease involves complex molecular mechanisms, including exposure to carcinogens, and is associated with ongoing exposure to asbestos fibers, which determines its malignant nature.

History of the disease and interesting historical facts

The history of mesothelioma dates back to the early 20th century, when doctors began to notice a connection between asbestos exposure and the development of this tumor. The first cases of mesothelioma were documented in 1943, when several patients working in asbestos factories were described. The increase in mesothelioma cases in the following decades led to a deeper study of the health effects of asbestos. In the 1960s, scientists such as Dr. D. P. Pomeroy and Dr. A. I. Medvedev proved that asbestos is a carcinogen, which eventually led to a ban on its use in many countries. In recent decades, research has continued to deepen, with bacteriological and genetic aspects of the disease becoming the subject of active study, allowing for a better understanding of the mechanism and treatment options for mesothelioma.

Epidemiology

According to various studies, the epidemiology of mesothelioma varies considerably by region, depending on the historical use of asbestos. Developed countries, where asbestos was most widely used, have the highest incidence of the disease. For example, in some areas of the UK and Australia, the incidence rate reaches 10-15 cases per 100,000 people per year. Mesothelioma is 3-5 times more common among men than women. Most cases are diagnosed in people over 60 years of age, but the disease can also occur in younger people, especially if they have had significant exposure to asbestos. There is evidence that people who worked with asbestos may still be at risk for developing mesothelioma even 20-40 years after exposure has ceased.

Genetic predisposition to this disease

Research shows that genetic predisposition plays an important role in the development of mesothelioma. In particular, certain genes and mutations have been identified that are associated with an increased risk of this disease. There is evidence that mutations in genes involved in cell cycle control and DNA repair may contribute to carcinogenesis when exposed to asbestos. For example, mutations in the BAP1 and NF2 genes have been associated with a hereditary form of mesothelioma. In addition, polymorphisms in certain genes responsible for carcinogen metabolism may also influence the risk of the disease, which highlights the importance of genetic predisposition in the context of exposure to environmental carcinogens.

Risk factors for the development of this disease

Mesothelioma is most often associated with several key risk factors:

• Asbestos Exposure: Long-term inhalation of asbestos fibers is the most significant risk factor for developing mesothelioma.
• Smoking: Although smoking does not directly cause mesothelioma, it can increase the risk of developing lung cancer, which when combined with asbestos significantly increases the risk.
• Asbestos exposure in the workplace: Work in the construction, shipbuilding and mining industries significantly increases the risk of developing the disease.
• Family history of mesothelioma: A family history of mesothelioma may indicate a genetic predisposition to the disease.
• Certain chemicals: Exposure to certain carcinogens, such as crystalline silica, may also play a role in the development of mesothelioma.

Diagnosis of this disease

Diagnosis of mesothelioma is a complex process that includes the following steps:

• Main symptoms: Patients often present with symptoms such as dyspnea, chest pain, cough, and unexplained weight loss. These symptoms may be non-specific and may occur at a later stage of the disease.
• Laboratory tests: Blood tests can help identify markers, but the diagnostic value of these tests is limited.
• Radiologic tests: Computed tomography (CT) and magnetic resonance imaging (MRI) are key imaging techniques to identify tumors and assess their spread.
• Biopsy: Confirmation of the diagnosis is done by performing a biopsy, which allows tissue samples to be examined under a microscope.
• Differential Diagnosis: It is important to differentiate mesothelioma from other types of tumors such as lung cancer, pleurisy and other benign or malignant tumors.

Treatment

Treatment for mesothelioma is usually combined and may include:

• General care: Includes patient support and symptom management. Palliative care may be needed to improve quality of life.
• Pharmacological treatment: Chemotherapeutic drugs such as cisplatin and Pemetrexed are used to inhibit tumor growth.
• Surgical treatment: Surgery may be used to remove the tumor, but complete removal is not always possible due to the widespread nature of the disease.
• Other treatments: Immunotherapy and targeted therapy are also under active investigation and are showing encouraging results in selected clinical trials.

List of medications used to treat this disease

Some of the medications used to treat mesothelioma include:

• Cisplatin
• Pemetrexed
• Nivolumab
• Dosetaxel

Disease monitoring

Mesothelioma monitoring involves regular check-ups and diagnostics to track the progression of the disease and assess the effectiveness of treatment. Monitoring steps may include:

• Regular radiological studies, including CT and MRI, to assess the extent and location of the tumor.
• Assessing the patient's symptoms and general condition to help understand how successful the treatment is.
• Prognosis: Unfortunately, mesothelioma has a poor prognosis, especially in its later stages. The average survival rate is 12-21 months after diagnosis.
• Complications: Relapses of the disease, spread of the tumor to other organs and development of concomitant diseases are possible.

Age-related features of the disease

Mesothelioma most often occurs in people over 60 years of age, although cases of the disease can also occur in younger people, especially those who have been exposed to asbestos. In older patients, the disease may proceed with more pronounced symptoms and complications, while in younger groups there are cases of a more aggressive course of the disease. Considering age aspects, it is important to note that each patient has an individual course of the disease, which must be taken into account when choosing diagnostic and treatment methods.

Questions and Answers

• What is mesothelioma? Mesothelioma is a malignant tumor arising from mesothelial cells, usually associated with exposure to asbestos.
• What are the main symptoms of mesothelioma? The main symptoms include dyspnea, chest pain, cough and weight loss.
• How is mesothelioma diagnosed? Diagnosis includes laboratory tests, radiological examinations and biopsy.
• How is mesothelioma treated? Treatment may include chemotherapy, surgery, and palliative care.
• What is the prognosis for mesothelioma? The prognosis is generally poor, with median survival being 12–21 months after diagnosis.