What is Malignant Mesothelioma?

Malignant Mesothelioma (MEEZ-o-THEE-lee-o-ma) is a rare form of cancer that begins in the mesothelium.  The mesothelium is made up of visceral and parietal membranes, which surround organs and body cavities, such as the lungs or abdomen.  The visceral membrane covers the organ and the parietal membrane covers the visceral membrane.  The mesothelium secretes a fluid that helps the organs move easily together. In the case of the lung, it helps reduce friction between the lung and chest wall during normal breathing.  There are different types of Mesothelioma, depending where it is found.  In the abdomen, it is called peritoneal Mesothelioma; on the lungs, it is called pleural Mesothelioma; and if it develops on the heart pericardial Mesothelioma. The mesothelial tissue surrounding the male internal reproductive organs is called the tunica vaginalis testis.  The tunica serosa uteri covers the internal reproductive organs in women.

Mesothelioma, cancer of the mesothelium, is a rare form of cancer in which the cells become abnormal and divide out of control.  They attack nearby healthy tissue and organs.  You then have Mesothelioma.

What are the symptoms of Mesothelioma?

The most common symptoms of  pleural Mesothelioma are difficulty breathing, chest pain or both.  In addition to a general feeling of not being well, other less common symptoms include:

      * shortness of breath

      * weight loss

      * fever

      * night sweats

      * cough

The most common symptoms of peritoneal Mesothelioma may include:

      * swelling

      * pain due to fluid in abdominal cavity

      * weight loss

      * a mass in the abdomen

      * bowel obstruction

      * fever

How is Mesothelioma diagnosed?

Since many of the symptoms of Mesothelioma are similar to those of other conditions, including other types of cancer, diagnosing Mesothelioma can be difficult.

Diagnosis and testing

Several tests can be used to help physicians make the diagnosis of Mesothelioma including a chest x-ray, a CT scan, and/or an MRI scan.  A chest x-ray yields an image of the lungs that will show any abnormal changes.  A CT(computed topography) is a type of x-ray, but it uses a computer rather than film and yields a much more detailed image.  An MRI scan (magnetic resonance imaging) uses magnetism, radio waves and computer and it does not use x-ray radiation.

These tests help physician differentiate Mesothelioma from other lung tumors as well as determine where the tumor is and its size. 

A biopsy---the removal of tissue sample from the tumor to confirm diagnosis---is needed to confirm a diagnosis of Mesothelioma.