Mesothelioma Types

How are different types of mesothelioma classified?

Types of Mesothelioma by Site

Pleural Mesothelioma

Pleural mesothelioma is not always easily detectable. Frequently, in the early stages of the disease, such as stage 1 mesothelioma, symptoms may be mild. Patients usually report pain in one area of the chest that never seems to go away, weight loss and fever. Occasionally, other symptoms are more severe and include problems with breathing due to fluid build up in the chest. A CT Scan of the chest area has proven to be the best test for identifying how far along the disease has progressed.

Frequently serum markers are used to diagnose of various forms of cancer. Mesothelioma cannot be diagnosed using this method as no serum markers currently exist.

The mesothelioma survival rate for patients diagnosed with pleural mesothelioma typically is not high, as patients often do not live beyond seventeen months from the onset of symptoms. Only 8% of those with a mesothelioma diagnosis will live three to five years from the onset of mesothelioma symptoms.

Peritoneal Mesothelioma

Peritoneal mesothelioma originates in the abdomen and will frequently spread to other organs in area including the liver, spleen or bowel. Severe abdominal pain is the most common complaint that patients first experience. There may also be a discomfort level with fluid buildup in the abdomen as well. Other symptoms of peritoneal mesothelioma may include difficult bowel movements, nausea and vomiting, fever and swollen feet.

The survival rate for those diagnosed with peritoneal mesothelioma is typically in the range of approximately ten months from the time that they first started experiencing the symptoms noted above. However, outcomes are quite variable from one patient to another, so population-based statistics should not be presumed to limit the outcome for an individual patient.

Pericardial Mesothelioma

Pericardial mesothelioma is the least common form of mesothelioma. Pericardial mesothelioma, as the name suggests, involves the heart. This rare type of mesothelioma cancer invades the pericardium, the sac that surrounds the heart. As the cancer progresses, the heart is not able to deliver oxygen as efficiently to the body causing further decline in health at an increasingly rapid rate. The symptoms most commonly associated with pericardial mesothelioma mimic those of a heart attack: nausea, pain in the chest and shortness of breath.

Types of Mesothelioma Tumors

Malignant Mesothelioma

The symptoms associated with malignant mesothelioma make it difficult for doctors to diagnose. Often, by the time that a proper diagnosis is made, the disease has progressed to a point where patients do not respond well to treatment therapy. Malignant mesothelioma is caused almost exclusively by the inhalation of airborne asbestos particles. Another unique factor associated with the disease is that there can be a long latency period between the time of asbestos exposure and the actual manifestation of the disease in the form of malignant mesothelioma.

Benign Mesothelioma

Benign mesothelioma, or non-malignant mesothelioma, is much easier to treat than the malignant form of the cancer and can be treated successfully in many cases.

Mesothelioma Cell Types

Epithelial Mesothelioma

Epithelial Mesothelioma is the most common cell type and accounts for approximately 50-75% percent of all diagnosed cases each year. These cells are uniform in shape, with an elongated pattern that makes them easily distinguishable when viewed under high magnification. These types ofcancercells are adenocarcinomas, malignancies which are more commonly associated with pure lung cancers as opposed to cancers of the mesothelium.

Sarcomatoid Mesothelioma

Sarcomatoid mesothelioma is a less common cell type, accounting for between 7 and 20% of mesothelioma cases each year. These cells grow forth out of supportive structures, such as muscles and bones.

Biphasic Mesothelioma

Biphasic mesotheliomas are those with a mix of epithelial and sarcomatoid cell types. Mesothelioma treatment options do not vary greatly for different cell types, but often sarcomatoid mesotheliomas are more difficult to treat as a result of the surrounding affected tissues that they spread from.

Papillary Mesothelioma

Papillary mesothelioma, also known as well-differentiated mesothelioma, is a form of the asbestos cancer that typically affects women. In many cases this cell type is benign and not likely to spread to other organs in the body.

Source http://www.mesothelioma.com/mesothelioma/types/

Mesothelioma Diagnosis

How do medical professionals diagnose mesothelioma?

If you believe that you may have mesothelioma, a qualified medical professional will use a variety of diagnostic tests and methods to confirm the presence of the disease.

The first step that mesothelioma doctors will take in evaluating an asbestos related disease is to obtain a full medical history to determine the level and severity of mesothelioma risk factors and presenting mesothelioma symptoms. This interview will consider among other things, where asbestos exposure occurred, the length of exposure and the amount of asbestos that you were exposed to.

In addition, he/she will perform a medical exam to look for signs and symptoms of various types of mesothelioma. For example, if pleural mesothelioma is suspected the doctor will look for fluid in the chest, peritoneal mesothelioma often shows fluid in the abdomen and pericardial mesothelioma presents with fluid in the area of the heart.

Diagnostic Tests

Imaging Scans

Diagnostic image tests like x-rays, CT scans and MRI's are useful in obtaining more information about the cancer including how far it is progressed. Each method provides another piece of information for your doctor to assist him/her in making an accurate diagnosis. Chest x-rays are used to identify abnormalities in the lungs including unusual thickening, mineral deposits and fluid in the chest area. CT scans are capable of providing images of the same location from many different angles. MRI technology uses magnetic fields rather than x-ray to provide additional views.

• PET scan - Positron Emission Tomography, more commonly referred to as a PET scan, is a nuclear medicine diagnostic technique. Nuclear medicine involves introducing a small amount of radioactive material into the body (in this case, intravenously) to help doctors determine if the body is functioning properly. PET scans in mesothelioma patients are often used in conjunction with CT scans. PET scans can be particularly helpful in determining if the cancer has metastasized beyond its point of origin.
• CT Scan - A Computer Tomography scan or CT scan, as it is more often referred to, is a commonly utilized method for locating the tumor in the body and determining the extent of the disease. Doctors will often prescribe a CT scan if mesothelioma is suspected because it offers more detail than a traditional X-ray. The CT scan provides cross-sectional imaging of the internal body structures that can be reconstructed on a computer monitor.
• MRI - A magnetic resonance image, more commonly referred to as an MRI, is a noninvasive method used for diagnosing mesothelioma within the body. The MRI uses a magnetic field and radio frequency pulses, transmitting them to a computer. Traditional MRI equipment consists of a cylinder within which the patient lies. The MRI poses no risk for patients, though some find the enclosed spaces uncomfortable. These patients may request a mild sedative to allow them to remain still and calm during the procedure.
• X-Ray - An x-ray is a commonly utilized mechanism not only for cancer diagnosis but for many different respiratory abnormalities, including bronchitis and pneumonia. Nevertheless, given that the symptoms of these respiratory disorders closely mimic those of malignant mesothelioma, often a chest x-ray is the first imaging technique used in a mesothelioma diagnosis. X-rays are particularly adept at identifying the proliferation of fluid within the pleural cavity, a symptom of mesothelioma known as a pleural effusion. If effusion is detected in the pleural cavity, doctors will often prescribe a surgical biopsy to test the fluid for malignant mesothelioma cells.

Biopsies

A biopsy is an important diagnostic procedure recommended by doctors for patients presenting with signs and symptoms of mesothelioma that have a history of asbestos exposure. Fine needle aspiration (FNA) is the less invasive type of biopsy that can be performed. FNA biopsy may be done on a pleural-based solid lesion, or cancer-associated fluid may be extracted through a syringe and then tested for the presence of malignant cells. Upon determining the presence of malignant cells, cancer specialists will determine the cellular classification of the malignancy and if mesothelioma is, in fact, present. However, it is not uncommon for there to be no cancer cells in the fluid or an insufficient number to make a definitive diagnosis even when cancer is present.

• Needle Biopsy- The needle biopsy is considered the less invasive biopsy procedure. Commonly, a more substantial biopsy of cancer tissue is generally recommended for patients in whom mesothelioma is suspected, such as a core biopsy. This may be done as a CT-guided biopsy from outside of the chest, or sometimes a small lung surgery such as a video-assisted thoracoscopic surgery (VATS), in which a surgeon uses small surgical tools with cameras and biopsy equipment to look inside the chest along the pleural surface (pleuroscopy) with a minimally invasive approach. It is often helpful and sometimes necessary for a surgeon to do a VATS and directly biopsy suspicious nodules in order to establish the diagnosis
• Surgical Biopsy - A surgical biopsy is a far more extensive procedure than needle biopsy. Nevertheless, these procedures are sometimes necessary to make a conclusive diagnosis of mesothelioma. Surgical biopsy can be particularly useful once a diagnosis has already been established. Once cancer is effectively staged, treatment recommendations can be made based on the best possible scenario for each individual patient’s circumstances.

Source http://www.mesothelioma.com/mesothelioma/diagnosis/

Mesothelioma Symptoms

What are the most common warning signs of mesothelioma?

Mesothelioma is difficult to diagnose because the early signs and symptoms of the disease can be subtle or mistaken. Symptoms are all too frequently ignored or dismissed by people who are inclined to attribute them to common every day ailments. Sometimes patients live with symptoms for up to 6 months before being diagnosed but usually the symptoms are present for two to three months prior to a mesothelioma diagnosis.

About 60% of patients diagnosed with pleural mesothelioma experience lower back pain or side chest pain, and there are frequent reports of shortness of breath. Lower numbers of people may experience difficulty swallowing, or have a persistent cough, fever, weight loss or fatigue. Additional symptoms that some patients experience are muscle weakness, loss of sensory capability, coughing up blood, facial and arm swelling, and hoarseness.

Peritoneal mesothelioma originates in the abdomen and as a result, symptoms often include abdominal pain, weight loss, nausea, and vomiting. Fluid buildup may occur in the abdomen as well as a result of the cancer.

Asbestos exposure is considered the primary risk factor for the development of the cancer. Anyone previously exposed to asbestos displaying any of these symptoms should seek medical attention from their doctor first, only to be referred to a doctorwho specializes in the treatment of mesothelioma and thoracic oncology after receiving a positive diagnosis.

How long does it take for mesothelioma symptoms to appear?

One of the most unique facts about mesothelioma is that the disease is characterized by a long latency period that is very often associated with the disease. The latency period is the amount of time that elapses from the first point of asbestos exposure to the point where symptoms begin to appear so that a diagnosis can be made. In some mesothelioma cases the latency period is reported to be 10 years but the average latency for the majority of cases is between 35 and 40 years. As a result, the cancer often progresses to later stages before a diagnosis is made. When diagnosed in the later stages, mesothelioma treatment options become more limited and are less effective.

Symptoms of Mesothelioma

Provided below is a list of symptoms that mesothelioma patients may experience. Please click on a symptom to learn more about it.

Anemia

Mesothelioma patients diagnosed with anemia have a lower than normal red blood cell count or hemoglobin in the blood.

Blood Clotting Disorder

A symptom experienced by many mesothelioma patients that can lead to anemia and other serious complications if not given appropriate medical attention.

Bowel Obstruction

Bowel obstructions can be a direct effect of the cancer. It is a very painful symptom that can sometimes develop in peritoneal mesothelioma patients.

Chest Pain

Often experienced in pleural mesothelioma and pericardial mesothelioma patients, chest pain can develop as the tumor grows and places strain on the lungs and heart.

Dysphagia

Pleural mesothelioma patients often develop difficulty swallowing (esophageal dysphagia) as the mesothelium continues to grow on the lungs.

Fluid Effusion

An effusion can occur in mesothelioma patients when there is fluid buildup affecting either the pleura or pericardium. This may need to be drained in a relatively limited surgical procedure to control the effusion and associated symptoms.

Hemoptysis

Hemoptysis, or the symptom of coughing up blood, can have its origins in the lungs, bronchi or trachea of mesothelioma patients.

Nausea

Nausea is experienced in a number of cancer patients, as it is often a side effect of chemotherapy treatment and sometimes the underlying cancer. Those diagnosed with peritoneal mesothelioma may also experience nausea as a result of increasing abdominal pressure.

Peritoneal Effusion

Peritoneal mesothelioma patients may experience a buildup of fluid in the peritoneum as the tumor continues to grow. This can result in an effusion which can inhibit the function of abdominal organs.

Peritoneal Effusion

In pleural mesothelioma patients, pleural effusion may develop when there is a large amount of fluid present in the pleura, the lining between the lungs and chest cavity.

Weight Loss

Weight loss can occur in mesothelioma patients as a side effect from cancer treatment or as the result of other symptoms that may also be present, such as difficulty swallowing or nausea.

Source http://www.mesothelioma.com/mesothelioma/symptoms/