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Mesothelioma: Symptoms, Causes and Treatment

By Dr. Muzammil Shaikh in Nanavati Max Institute of Cancer Care

Jun 25 , 2024 | 18 min read

Overview of Mesothelioma

Mesothelioma, a rare and aggressive form of cancer, often poses a significant health risk. It primarily affects the mesothelium - a protective tissue lining that covers most of our internal organs. This malignancy is usually associated with asbestos exposure, making asbestos the leading cause of mesothelioma.

Understanding the causes of mesothelioma aids greatly in its prevention. The ingestion or inhalation of asbestos fibers can lead to their embedding in the body tissues, causing damage over a long period. These fibers may stay latent in the body for years, even decades before manifesting as mesothelioma. Although considered a challenging condition to treat, advancements in medical science have led to improved mesothelioma treatment options. The course of treatment primarily depends on the type and stage of the cancer, along with the individual's overall health condition. Common approaches include surgery, chemotherapy, radiation therapy, or sometimes, a combination of these treatments.

While mesothelioma is a severe condition caused by specific environmental factors such as asbestos exposure, there is hope for individuals affected by this disease due to the progression in its treatment methods. Recognizing asbestos as a potential danger and understanding how it contributes to this form of cancer go a long way in preventing it from taking root in our lives.

Mesothelioma Symptoms

In the quest for a healthier life, it is crucial to understand the early warning signs of potential health issues. Today's focus is on mesothelioma, a rare form of cancer that is primarily caused by exposure to asbestos. 

Early Warning Symptoms:

  • Shortness of breath or wheezing without exertion
  • Persistent dry cough or cough with blood
  • Chest pain or tightness
  • Fatigue or anaemia
  • Loss of appetite and unexplained weight loss

These symptoms occur due to the thickening of the pleural membrane surrounding the lungs, as a result of mesothelioma. It is noteworthy that these symptoms can also be associated with other conditions. Hence, if you experience any of these symptoms persistently, it would be judicious to consult your family doctor immediately. 

Progression of Symptoms:

As mesothelioma develops, the symptoms tend to become more severe and specific:

  • Difficulty swallowing (dysphagia)
  • Swelling in the neck or face due to pressure on a major blood vessel (superior vena cava syndrome)
  • Pain caused by pressure on nerves and spinal cord (nerve pain)
  • Hoarseness in voice 
  • Severe chest or abdominal pain 
  • Lower back pain 
  • Fever or sweating particularly at night 

Please note that it is crucial not to self-diagnose based on these symptoms as they could indicate several other conditions. It is always best to seek professional medical advice.

Complications associated with mesothelioma:

Unattended mesothelioma complications could lead to:

  • Pleural Effusion: Excess fluid builds up between the layers of pleura outside the lungs.
  • Respiratory Complications: Breathing difficulties can arise from extensive damage to lung tissues.
  • Metastasis: If untreated, there are possibilities that cancer may spread further in the body.
  • Horner's Syndrome: A condition affecting the nerves to the eye and face 

The outlook for mesothelioma patients has significantly improved over the years, thanks to advancements in medical research. Today, various mesothelioma treatment options can significantly improve the quality of life and even extend survival rates.

Mesothelioma Types

The causes of mesothelioma often trace back to exposure to asbestos, a naturally occurring fibrous mineral. There are several types of mesothelioma, each affecting different parts of the mesothelium. Knowledge about these types can aid in early detection and treatment. Let us dive into these specifics.

  • Pleural mesothelioma: Making up around 70-80% of all mesothelioma cases in India, pleural mesothelioma commences in the pleura - a thin membrane of cells that line the lungs and chest wall. It is primarily linked to asbestos exposure. Initial symptoms can be deceptive, often mistaken for common illnesses like flu or pneumonia. Persistent coughing, shortness of breath, and chest pain are indicators, demanding immediate attention from a learned doctor. Research continues to improve treatments and promises hope through surgery, radiation therapy, or chemotherapy.
  • Peritoneal mesothelioma: Accounting for approximately 20- 30% of all Indian mesothelioma cases, peritoneal mesothelioma occurs in the peritoneum – a thin layer of cells that cover the organs within the abdomen. Typical symptoms include abdominal pain, swelling and weight loss. Survival rates have improved significantly due to advancements in heated intraoperative chemotherapy (HIPEC), a targeted treatment approach which combines surgery with heated chemotherapy.
  • Pericardial mesothelioma: This is an extremely rare form of mesothelioma that impacts the pericardium – the thin sac-like membrane surrounding our heart. Symptoms can include chest pain or palpitations, fatigue, or difficulty breathing. Due to its rarity and advanced stage at diagnosis, treatment options are limited but palliative care can help manage symptoms and improve quality of life.

While mesothelioma is a serious illness, recent advancements in medical science promise improved survival rates and better quality of life for patients. The key lies not just in awareness of mesothelioma types but also in understanding their causes and initiating timely treatment. 


Mesothelioma Causes

Asbestos Exposure: Primary Cause

Mesothelioma is a type of malignant tumour that primarily affects the lining of the lungs, heart, abdomen, and various body parts. The chief cause behind this menacing disease is asbestos exposure. Symptoms may take many years to surface after the initial exposure, creating hurdles in early detection and complicating the process of mesothelioma treatment

Asbestos comprises a group of naturally existing fibrous minerals known for their significant heat-resistant properties. Due to its unique characteristics, it found widespread usage in different industries such as manufacturing bricks and cement, constructing railway carriages, and shipbuilding. Comprising microscopic fibres, asbestos can be effortlessly inhaled or swallowed. When these fibres enter our system, they embed themselves in the organs' linings resulting in inflammation and irritation over time. This sustained aggravation paves the path for mesothelioma's development.

To understand asbestos-related mesothelioma causes more thoroughly, let us focus on some contributing factors:

  • Occupational Exposure: Certain occupations like construction workers, miners, factory workers or shipyard employees inherently involve a higher risk due to their job nature.
  • Environmental Exposure: Residing near asbestos mines or factories or areas where asbestos naturally occurs could enhance the risk.
  • Secondary Exposure: Surprisingly, people living with asbestos workers can also develop mesothelioma due to secondary exposure when asbestos fibres attach themselves to clothing and are inadvertently brought home.

Although India prohibited asbestos usage in 2011, certain reports suggest that previous exposures and ongoing illicit use continue to escalate mesothelioma cases. Recognising these causes plays a crucial role in curtailing exposure and formulating robust surveillance systems for prompt detection and effective mesothelioma treatment.

Mesothelioma Risk Factors

A significant aspect of understanding health problems involves exploring their causes or risk factors. In India, mesothelioma cases are increasing, amplifying the need for awareness about associated risks.

High-risk Occupations and Environments:

Primarily, it is crucial to acknowledge that certain occupations bring individuals into contact with asbestos, a primary causative agent of mesothelioma. Some of these high-risk occupations include:

  • Shipbuilding and naval work: The shipbuilding industry used asbestos for fireproofing ships, posing a significant risk to shipyard workers. Workers handling asbestos-containing materials in constructing or repairing ships are at risk.
  • Asbestos mining and milling: Workers involved in asbestos mining, milling, or those manufacturing asbestos products are at an increased risk.
  • Construction industry: Those involved in building renovations or demolitions, wherein older buildings with asbestos materials are dealt with, are also exposed to a higher risk.
  • Power plants: Asbestos was frequently used for insulation in power plants, putting workers at these sites at high risk.

In addition, living close to such industries or naturally occurring asbestos deposits also increases an individual's risk factor.

Other Potential Contributing Factors:

While asbestos is a major cause, other potential factors contributing towards mesothelioma include:

  • Asbestos in The Living Environment: Apart from workplaces, some homes may also have asbestos content if they were built before regulations about asbestos use came into place.
  • Previous Radiation Therapy: Individuals who have received radiation therapy for earlier cancers might be at an increased risk. 
  • Chronic Inflammation: Prolonged inflammation due to conditions like pleurisy could potentially lead to mesothelioma. 
  • Genetic Factors: Some research suggests that individuals with certain inherited genetic mutations may be more susceptible.

However, it is imperative to remember that not everyone exposed to these factors will develop mesothelioma. This underlines the complexity of this disease and highlights the need for further research on mesothelioma causes. Moreover, mesothelioma treatment in India has seen advancements over the years. There are more options now than ever before for treating this disease. However, prevention remains better than cure. Thus, awareness about these risk factors can help individuals take appropriate precautions.

Mesothelioma Diagnosis

Mesothelioma is often caused by exposure to asbestos fibres. The early detection of this disease is of paramount importance as it offers the best chance for effective treatment and prolonged survival. 

Importance of early detection

The initial step in diagnosing mesothelioma involves recognising its symptoms, which include chest pain, shortness of breath, and unexplained weight loss. Understandably, these symptoms can be quite alarming and can often be mistaken for other less serious conditions. Hence, one should always consult with their family doctor for a thorough examination if they experience any unusual health changes, especially if they have had prior asbestos exposure.

Diagnostic Procedures

To confirm a diagnosis of mesothelioma, doctors employ various diagnostic procedures like imaging tests and biopsies.

  1. Imaging Tests: These include X-rays, CT scans (computed tomography), MRI (magnetic resonance imaging), and PET scans (positron emission tomography). Each of these tests provides mesothelioma doctors with unique visual data about the body's internal structures allowing them to identify any abnormalities linked to mesothelioma.
  • X-ray: This simple test offers an initial glimpse into the chest or abdomen where mesothelioma typically forms. It helps detect unusual thickening of the pleura or fluid buildup, which are common signs of mesothelioma.
  • CT scan: It generates more detailed images than X-rays. It can help determine the precise location, size, and spread of the tumour.
  • MRI: It creates highly detailed images using magnetic fields and radio waves. MRI is particularly useful in assessing whether the cancer has invaded nearby tissues or organs.
  • PET scan: This scan helps distinguish between malignant (cancerous) and benign (non-cancerous) cells. It also assists in identifying whether the cancer has spread to other areas of the body.
  1. Biopsy: This procedure is the only definitive method to confirm mesothelioma. It involves extracting a small sample of tissue or fluid from the affected area, which is then studied under a microscope by pathologists. They look for the presence of cancerous cells in the sample to confirm a diagnosis of mesothelioma.

Overall, diagnosing mesothelioma requires a series of tests, each serving its own purpose in the detection and staging of the disease. Once a diagnosis is confirmed, doctors can develop an effective treatment plan tailored to the patient's specific type and stage of mesothelioma. With ongoing research and advancements in medical technologies, there is increasing hope for improved outcomes for those diagnosed with this disease. 

Mesothelioma Stages

Staging the Disease: Overview of Mesothelioma Stages

Understanding mesothelioma and its stages is vital to comprehend its progression and severity, and to make informed decisions about the treatment.

The disease is typically categorised into four stages:

  • Stage I:At this initial stage, mesothelioma remains confined to its point of origin. It could be just inside the lung's lining or in part of the chest wall or diaphragm. It has not spread far, offering a broader range of treatment options.
    • Stage 1A: The tumour is confined to one side of the pleural lining.
    • Stage 1B: The tumour spreads to both layers of the pleura on one side of the chest.
  • Stage II: The cancer has begun to spread from its point of origin. It may have reached other areas within the chest cavity such as lymph nodes nearby. This stage still offers several treatment routes but with a slightly escalated level of concern.
  • Stage III: This advanced stage sees mesothelioma infiltrating further into tissues and organs within the same side of the body. Symptoms become more noticeable, and treatments are often directed towards relieving these symptoms and slowing disease progression.
  • Stage IV: At this final stage, mesothelioma has spread extensively throughout the body. The focus here shifts fully towards palliative care aimed at controlling symptoms and maintaining quality of life.

The staging process provides crucial information about a patient's condition; it guides doctors in deciding appropriate mesothelioma treatment options best suited for each patient's situation—options that could range from surgery, chemotherapy, radiation therapy, or palliative care based on the disease progression. Understanding mesothelioma stages is essential in helping patients and their families deal with the disease and its effects more effectively. It allows them to be better prepared and make informed decisions about their treatment. Although mesothelioma is a severe disease, advancements in medical science offer hope for improved management and quality of life. 

Mesothelioma Complications

When an individual is diagnosed with mesothelioma, they often encounter numerous complications. These range from respiratory and cardiovascular issues to a significant impact on their quality of life. Understanding these complications and learning how to manage them forms an integral part of the journey towards mesothelioma treatment.

Respiratory and Cardiovascular Complications:

Mesothelioma, primarily caused by prolonged exposure to asbestos fibres, affects the thin layer of tissue lining the lungs or abdomen. The key complications arising from this disease can be categorised as:

  • Respiratory complications: Patients may experience difficulty in breathing, persistent coughing, chest pain, and fluid build-up in the chest cavity known as pleural effusion.
  • Cardiovascular problems: Some patients might face cardiovascular challenges such as pericardial effusion, where fluid accumulates around the heart causing breathlessness and fatigue.

Impact on Quality of Life:

The quality of life for mesothelioma patients often sees a downward shift due to the severity of symptoms and possible side effects of treatments. Fatigue, loss of appetite, and difficulties in sleeping are some common complaints besides experiencing emotional distress due to the disease's prognosis.

Furthermore, this disease often brings about emotional stress and anxiety. The diagnosis itself can be overwhelming, as can the prospect of living with this condition and undergoing intensive treatments.

Managing Complications in Mesothelioma Patients:

Mesothelioma treatment plans are typically designed to alleviate symptoms and improve a patient’s quality of life. Some measures include:

  • Palliative care: This approach focuses on providing relief from pain and other distressing symptoms rather than curing the disease itself. 
  • Lifestyle modifications: Regular light exercise can help combat fatigue and improve mental well-being. A balanced diet ensures that nutritional needs are met despite loss of appetite.
  • Psychological support: Emotional support through counselling or support groups can help patients cope with anxiety and depression associated with their diagnosis.
  • Medications: Specific medications can reduce fluid build-up in the lungs or around the heart, offering relief from pain and breathlessness.
  • Surgery: In some cases, removing part or all of the tumour through surgery can alleviate symptoms considerably.

While mesothelioma causes severe complications and impacts patients' lifestyles drastically, various treatment plans and support systems can help manage these challenges. It is crucial for patients to have regular consultations with their doctors to discuss any concerns and modifications in treatment strategies.

Mesothelioma Treatment Options

When it comes to the battle against mesothelioma, understanding the available treatment pathways is crucial. Each patient's journey is unique, and doctors work closely with patients to create a personalised treatment plan.

Surgery, Chemotherapy and Radiation therapy

  • Surgery: This is often one of the first steps in treating mesothelioma. Surgeons attempt to remove as much of the tumour as possible. The type of surgery depends on several factors such as the stage and location of the cancer, as well as the patient's overall health. These could range from removing the tumour itself to more complex ones like pleurectomy or pneumonectomy, which involve the removal of part or all of a lung.
  • Chemotherapy: Chemotherapy uses drugs to kill cancer cells and limit their growth. It may be used before surgery to shrink tumours, post-surgery to eliminate remaining cells, or as a standalone treatment for advanced cases. Alimta (pemetrexed) and Cisplatin are commonly used drugs for mesothelioma.
  • Radiation Therapy: In radiation therapy, high-energy X-rays or other types of radiation are used to kill cancer cells or keep them from growing. It could be applied externally or internally (brachytherapy). Radiation therapy plays a vital role in reducing the size of tumours and relieving symptoms, especially in cases where surgery is not feasible.

Emerging Therapies and Clinical Trials

In addition to these traditional treatments, there are exciting developments in the field of mesothelioma treatment:

  • Immunotherapy: This novel approach aims to leverage the body’s immune system to fight cancer cells. Several promising immunotherapies like Keytruda (pembrolizumab) are currently under investigation for treating mesothelioma.
  • Gene therapy: Another area of research is gene therapy, which tries to correct genetic errors that lead to uncontrolled cell growth.
  • Clinical trials: Participating in clinical trials allows patients access to cutting-edge treatments that are not yet available publicly. They offer hope for improved survival rates while contributing valuable data to the overall understanding of the disease.
  • Photodynamic therapy (PDT): A unique approach where special drugs are activated using light to kill cancer cells.

Palliative Care and Supportive Therapies

Palliative care and supportive therapies are integral to mesothelioma treatment. While they might not directly affect the disease, these strategies aim to provide relief from symptoms and enhance the quality of life.

  • Palliative care: This involves managing pain, breathing difficulties, weight loss, and other physical challenges associated with mesothelioma. 
  • Supportive therapies: These could include physiotherapy, occupational therapy, dietary advice, and psychological support. They aim to help patients manage the impact of the disease on daily life.

In the fight against mesothelioma, it is essential to remember that each patient's journey is unique - what works for one may not work for another. However, with an array of treatment options available and continual advancements in medical research, there is reason to be hopeful. The key lies in understanding the disease and discussing these treatment options with the doctor to choose the best possible strategy.

Read More About: Radiation Therapy for Cancer: How Does It Work?

Mesothelioma Prevention

Understanding mesothelioma, its causes, and how to prevent it is an important step in reducing one's risk. As per Indian Cancer Society statistics, there has been an alarming rise in mesothelioma cases over the years, making prevention crucial.

Preventive Measures:

The number one cause of mesothelioma is exposure to asbestos. Hence, the primary preventive measure involves protecting oneself from asbestos exposure. 

  • Asbestos, which is widely used in construction and various industries, should be dealt with properly if encountered. Specialised professionals should handle any asbestos removal to eliminate accidental exposure.
  • Workers in industries like construction, shipbuilding, and manufacturing should use protective gear and adhere to safety protocols to avoid inhalation of asbestos fibres.
  • Regular health check-ups are essential for those exposed to asbestos as early detection can vastly improve prognosis.
  • Smokers exposed to asbestos have a much higher chance of developing lung-related diseases like mesothelioma. Giving up smoking is an essential preventive measure.

One must also be aware that mesothelioma takes a very long time to develop - often several decades after first exposure to asbestos. This makes early detection extremely challenging.

Prognosis and Life Expectancy:

The prognosis for mesothelioma patients varies significantly due to several factors such as the stage of the cancer, the patient's overall health condition, and the type of treatment received. However, advancements in medical science have led to improved mesothelioma treatment options that enhance survival rates and life quality.

Early detection plays a significant role in improving prognosis. More advanced stages require aggressive treatment regimes which could consist of chemotherapy, radiation therapy, or even surgery in specific cases. There has been significant progress made towards finding a cure for mesothelioma. Experimental therapies like gene therapy, photodynamic therapy, and immunotherapy show promise for future treatments. While a diagnosis of mesothelioma can be overwhelming, it is crucial to remember that every patient's journey with the disease is unique. Hope should never be lost as medical advances continually improve treatment options and survival rates.

It is important to maintain regular communication with one's doctor and seek support from organisations dedicated to helping mesothelioma patients. Empowered with knowledge, individuals can take proactive steps towards prevention and treatment of this disease.

Conclusion

Prioritising seeking professional medical advice for any health concerns is crucial for ensuring accurate diagnosis and appropriate treatment. The key points emphasised include the significance of early intervention, regular health screenings, and proactive healthcare management. Being proactive about health can lead to improved outcomes and overall well-being. Furthermore, supporting awareness and initiatives aimed at promoting health education and access to healthcare services plays a vital role in community well-being. Advocating for health awareness, backing initiatives, promoting the importance of regular check-ups, and seeking medical advice when necessary can collectively contribute to enhancing individual and community health outcomes.

Frequently Asked Questions (FAQs)

1. Are There Alternative Treatments for Mesothelioma?

Yes, alternative treatments for mesothelioma exist that help in managing the symptoms of this disease. These include acupuncture, massage therapy, herbal medicines, and yoga. It is important to note that while these therapies can provide relief from symptoms and improve the quality of life, they are not a substitute for conventional treatments such as surgery, chemotherapy, or radiation therapy.

2. How Can one Reduce The Risk of Mesothelioma?

The risk of mesothelioma can be reduced by limiting exposure to asbestos, its primary cause. This includes ensuring safe occupational practices if one is in an industry where asbestos is used and testing homes for asbestos if they were built before the 1980s.

3. What is The Life Expectancy with Mesothelioma?

The life expectancy of a patient with mesothelioma depends on several factors including the stage of the disease at diagnosis, the overall health condition of the patient, and their age. On average, patients survive about a year after diagnosis; however, early detection and advances in treatment can prolong survival.

4. Can Mesothelioma Be Cured?

Currently, mesothelioma cannot be definitively cured. However, treatments like surgery to remove tumours and chemotherapy can significantly improve survival rates and reduce symptoms.

5. How Does Mesothelioma Kill You?

Mesothelioma leads to complications like respiratory failure or pneumonia which can be fatal. As the disease progresses, it affects lung function and other bodily systems leading to organ failure.

6. Why is Mesothelioma Not Curable?

Mesothelioma is often detected late due to its long latency period and non-specific symptoms which makes it difficult to treat effectively. Moreover, it spreads rapidly within the chest cavity making it challenging to completely eradicate through surgery.

7. Is Mesothelioma Curable If Caught Early?

While not entirely curable even if caught early, treatment options are more effective and survival rates significantly improve when mesothelioma is detected in its early stages. Early detection can allow for surgical removal of the tumour and successful management of the disease with chemotherapy or radiation therapy.