Symptoms of mesothelioma take many years to become apparent. In other words it has a long latency period. This makes it difficult to diagnose and treat. The person may repeatedly visit the doctor with the symptoms but more often considered as respiratory infections. The non-specific symptoms make it hard for even experienced doctors to make a quick and conclusive diagnosis with mesothelioma patients. Even people exposed to asbestos start showing the manifestation late in their life. By the time, mesothelioma is diagnosed, it is already widespread. However, the awareness of mesothelioma has made people detect it in early stages.

Manifestation of mesothelioma largely depends upon the location size and nature of the tumor. Sign and symptoms also depend upon whether the tumor is benign or malignant. Benign type of mesothelioma usually does not manifest itself. On the other hand, malignant type of mesothelioma has severe symptoms. It is mostly due to the pressure exerted on surrounding soft tissues. The malignancy may invade surrounding tissues or may result in pericardial or pleural effusion. Invasion of the chest wall may lead to chest pain.

The early symptoms to watch out for are:

• Hemoptysis or Blood in the sputum
• A cough or a change in cough pattern
• Dysphagia or Difficulty in swallowing
• Hoarseness
• Shortness of breath
• Pain in the chest or abdomen
• Significant Weight loss.

Among all types of mesothelioma, the pleural form is the most prevalent form. As a result the pleural symptoms are the most common manifestations of mesothelioma. When in early stages, the symptoms are more or less like pneumonia and hence often misdiagnosed. However these symptoms along with history of asbestos exposure should ring alarms for mesothelioma. Physicians should be well aware of it as usually they are the first to get in contact with the patient.

Pleural mesothelioma

Dyspnoea or shortness of breath along with chest pain is common manifestation of pleural mesothelioma. Pleural effusion caused by collection of fluid between the two linings of lungs and chest cavity may give rise to persistent cough. On chest radiography a build-up of fluid or pleural effusion may be evident indicating viral pneumonia. The less common symptoms of pleural mesothelioma are:

• Chest pain
• Pain in the lower back
• Difficulty breathing
• Coughing
• Weight loss
• Fever
• Muscle weakness and sensory loss
• Swelling of the face and arms
• Hoarseness of voice
• Coughing up blood

Peritoneal mesothelioma

It involves structures like abdomen, stomach cavity, liver, spleen or the bowel. The origin of peritoneal mesothelioma is usually abdomen, from where it spreads to adjoining organs. The symptoms of peritoneal mesothelioma are:

• Pain or swelling in the abdomen due to a build-up of fluid
• Nausea
• Weight loss
• Bowel obstruction
• Anemia or swelling of the feet
• Abdominal bloating due to fluid accumulation in the abdominal cavity
• Swelling of the feet
• Fever
• Impaired bowel function

Pericardial mesothelioma

Pericardial mesothelioma is a very uncommon form affecting the pericardium. Pericardium is the cavity between the linings of the heart. The tumor that grows in the tissue surrounding heart tends to spread from there. Pericardial mesothelioma sufferers may experience chest pain, shortness of breath, persistent coughing and palpitations. Involvement of the membrane around the heart (pericardium) may cause heart rhythm disturbances.

The symptoms for all types of mesothelioma become more acute and obvious with the progression of the disease. In spite of it, it can be mistaken as other disease condition. The only differentiating feature is the history of exposure of asbestos. Therefore, it is critical to investigate one's exposure to asbestos. Symptoms like pain in the lower back or at the side of the chest, shortness of breath, trouble swallowing, cough, fever, sweating, fatigue and weight loss may be very common, but the doctor should elucidate the history of asbestos exposure to rule out the presence of tumor.