Diagnosis of Mesothelioma cancer is very difficult in many cases, because its symptoms can be associated with other diseases too. Hence patient's medical history is quite important to know, since if there was an exposure to asbestos from the sick person, the risk factors for developing Mesothelioma are greater.
The doctor will order you a physical examination, including chest and abdomen x-rays, and lung function tests. A computerized tomography (CT) or a computerized axial tomography (CAT) scan may be useful, along with a magnetic resonance imaging (MRI).
The CT scan allows a computer x-rays machine to create a series of detailed pictures of inner body areas. The MRI allows to obtain detailed images of areas inside the body through a powerful magnet linked to a computer.
The way to confirm a Mesothelioma diagnosis is a biopsy, in which an oncologist or a doctor specialized in diagnosing and treating cancer pathologies takes a sample of tissue from the patient to examine it under a microscope.
The biopsy may be performed in various ways. In a thoracoscopy the name of the biopsy if the cancer is in the chest the doctor makes a small cut through the patient's chest and introduce a tube called thoracoscope to look inside and take tissue samples.
In a peritoneoscopy if the cancer is in the abdomen the doctor makes the same procedure but in the patient's abdominal cavity to obtain tissue for examination.
The stage of the disease is important to know if cancer is metastasized to other parts of the body, and to apply the best treatment for the patient.
The disease will be 'localized' if the cancer is found only on the surface of the membrane, but it will be 'advanced' if it has spread to other parts of the body, such as lungs, abdominal organs, chest wall, lymph nodes.
Wednesday, September 23, 2009
Mesothelioma Staging Systems-How Do You Stage Mesothelioma
Most known cancers have various staging systems which have been developed to aid doctors and physicians in the diagnosis and treatment of individual cases of cancer.
Pleural mesothelioma is the only form of mesothelioma that has been successfully staged as it is the commonest type of the disease.There are three different staging systems used to determine the extent of pleural mesothelioma, each one of these three different staging systems measure different aspects of the cancer,including the size of the tumor, the level of spreading{metastases}and the probable involvement of lymph nodes.
The stage of mesothelioma at the time of diagnosis determines to a very large extent the type of treatment prescribed by the doctor.
Butchart System
The Butchart System is the oldest staging system for malignant mesothelioma and is the one most commonly used by doctors and specialists to diagnose and treat the tumor. The Butchart System is based on the tumor size (mass) and divides malignant mesothelioma into four stages:
• Stage 1 - Malignant mesothelioma has affected the right or left side of the chest cavity (pleural lining) and may be seen in the diaphragm.
• Stage 2 - Malignant mesothelioma has been found in the pleura on both sides of the body and may have also moved into the heart, stomach, or esophagus on both sides. Lymph nodes may be affected.
• Stage 3 - Malignant mesothelioma has reached the abdominal cavity (peritoneum). Lymph nodes past the chest may be affected.
• Stage 4 - Malignant mesothelioma has reached other organs and has entered the blood stream.
TNM System
The TNM System is a more modern staging system for malignant mesothelioma. The TNM System is based on the extent of the tumor, metastasis, and lymph node involvement. Again, the TNM System divides malignant mesothelioma into four stages:
• Stage 1 - Malignant mesothelioma is present in the left or right chest cavity (pleura) and may have metastasized to the lung, the sac around the heart (pericardium) or the diaphragm on the same side. Lymph nodes at stage 1 are not involved.
• Stage 2 - Malignant mesothelioma has reached from one side of the chest cavity to a lymph node near the lung area on the same side as the cancer. The cancer has metastasized to the diaphragm, pericardium (sac around the heart), or the lung on the same side as the primary tumor.
• Stage 3 - Malignant mesothelioma has penetrated the chest lining, heart, esophagus, muscle, ribs and vital organs within the chest cavity on the same side as the cancer. Lymph nodes may or may not be involved during this stage.
• Stage 4 - Malignant mesothelioma has metastasized to the pleural area and the lymph nodes on the opposite side of where the cancerous tumor is located. It may also have reached the chest cavities or lungs on both sides, or may have spread to the abdomen.
Brigham System
The Brigham System is the most modern of the three malignant mesothelioma staging systems. The Brigham System looks at different variables such as the involvement of the lymph nodes and the surgical ability to remove a malignant mesothelioma tumor (resectability). For this reason, it is not used very often to stage mesothelioma, as the cancer is rarely operable. The Brigham System divides malignant mesothelioma into four stages:
• Stage 1 - Malignant mesothelioma tumor is still resectable (able to be removed surgically) and the lymph nodes are not affected.
• Stage 2 - Malignant mesothelioma tumor is still resectable, but the lymph nodes are now affected.
• Stage 3 - Malignant mesothelioma tumor is not resectable and the malignant mesothelioma has penetrated the heart, chest wall, abdominal cavity or diaphragm. Lymph nodes may or may not be affected.
• Stage 4 - Malignant mesothelioma tumor is not resectable and has completely metastasized (spread throughout the body).
Process of Staging Malignant Mesothelioma
When mesothelioma is diagnosed by a physician or specialist, they must determine the extent of the cancer and how far it has spread. Most often, they will use imaging procedures to see inside the chest or abdomen to help determine the staging of the malignant mesothelioma. The imaging options physicians may use include:
• Chest X-ray
• CT scan of the chest and/or abdomen
• MRI scan of the chest and/or abdomen
• PET of the chest and/or abdomen
Pleural mesothelioma is the only form of mesothelioma that has been successfully staged as it is the commonest type of the disease.There are three different staging systems used to determine the extent of pleural mesothelioma, each one of these three different staging systems measure different aspects of the cancer,including the size of the tumor, the level of spreading{metastases}and the probable involvement of lymph nodes.
The stage of mesothelioma at the time of diagnosis determines to a very large extent the type of treatment prescribed by the doctor.
Butchart System
The Butchart System is the oldest staging system for malignant mesothelioma and is the one most commonly used by doctors and specialists to diagnose and treat the tumor. The Butchart System is based on the tumor size (mass) and divides malignant mesothelioma into four stages:
• Stage 1 - Malignant mesothelioma has affected the right or left side of the chest cavity (pleural lining) and may be seen in the diaphragm.
• Stage 2 - Malignant mesothelioma has been found in the pleura on both sides of the body and may have also moved into the heart, stomach, or esophagus on both sides. Lymph nodes may be affected.
• Stage 3 - Malignant mesothelioma has reached the abdominal cavity (peritoneum). Lymph nodes past the chest may be affected.
• Stage 4 - Malignant mesothelioma has reached other organs and has entered the blood stream.
TNM System
The TNM System is a more modern staging system for malignant mesothelioma. The TNM System is based on the extent of the tumor, metastasis, and lymph node involvement. Again, the TNM System divides malignant mesothelioma into four stages:
• Stage 1 - Malignant mesothelioma is present in the left or right chest cavity (pleura) and may have metastasized to the lung, the sac around the heart (pericardium) or the diaphragm on the same side. Lymph nodes at stage 1 are not involved.
• Stage 2 - Malignant mesothelioma has reached from one side of the chest cavity to a lymph node near the lung area on the same side as the cancer. The cancer has metastasized to the diaphragm, pericardium (sac around the heart), or the lung on the same side as the primary tumor.
• Stage 3 - Malignant mesothelioma has penetrated the chest lining, heart, esophagus, muscle, ribs and vital organs within the chest cavity on the same side as the cancer. Lymph nodes may or may not be involved during this stage.
• Stage 4 - Malignant mesothelioma has metastasized to the pleural area and the lymph nodes on the opposite side of where the cancerous tumor is located. It may also have reached the chest cavities or lungs on both sides, or may have spread to the abdomen.
Brigham System
The Brigham System is the most modern of the three malignant mesothelioma staging systems. The Brigham System looks at different variables such as the involvement of the lymph nodes and the surgical ability to remove a malignant mesothelioma tumor (resectability). For this reason, it is not used very often to stage mesothelioma, as the cancer is rarely operable. The Brigham System divides malignant mesothelioma into four stages:
• Stage 1 - Malignant mesothelioma tumor is still resectable (able to be removed surgically) and the lymph nodes are not affected.
• Stage 2 - Malignant mesothelioma tumor is still resectable, but the lymph nodes are now affected.
• Stage 3 - Malignant mesothelioma tumor is not resectable and the malignant mesothelioma has penetrated the heart, chest wall, abdominal cavity or diaphragm. Lymph nodes may or may not be affected.
• Stage 4 - Malignant mesothelioma tumor is not resectable and has completely metastasized (spread throughout the body).
Process of Staging Malignant Mesothelioma
When mesothelioma is diagnosed by a physician or specialist, they must determine the extent of the cancer and how far it has spread. Most often, they will use imaging procedures to see inside the chest or abdomen to help determine the staging of the malignant mesothelioma. The imaging options physicians may use include:
• Chest X-ray
• CT scan of the chest and/or abdomen
• MRI scan of the chest and/or abdomen
• PET of the chest and/or abdomen
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