Mesothelioma cancer cell types:

Mesothelioma cells are divided into three main categories: epithelioid, sarcomatoid cells, and a mix of the two types called biphasic mesothelioma.

Epithelioid Mesothelioma

Epithelioid mesothelioma cells are the most common, found in at least half of all cases of malignant mesothelioma. It is relatively easiest to treat of all types of mesothelioma. Accounting for approximately 50% to 70% of all mesothelioma cancer cells, epithelioid mesothelioma is the most common type of histological category. Because it is the least aggressive of the cell types, it generally responds the best to treatment, and offers the best prognosis.

These cells are relatively uniform in shape and have a tubular pattern with a distinct cell nucleus when observed under microscope. The individual cells are shaped like cubes or multi-sided boxes. Because of the similarity between adenocarcinoma and mesothelioma cancer cells, they are often confused and mesothelioma can be misdiagnosed. Inspection of the cancer cells under high-powered microscopes and identification of unique characteristics of the chemical properties of the cells can help make the proper diagnosis.

Sarcomatoid Mesothelioma

The second type of mesothelioma is sarcomatoid mesothelioma. Sarcomatoid mesothelioma is the most serious form of the disease, as it rarely responds to any treatment whatsoever. Cells of sarcomatoid mesothelioma are less common, occurring only in 20 to 40% of all cases.

Sarcomatoid cells may be found in the type of malignant mesothelioma cells known as biphasic cells– a combination of sarcomatoid and epithelioid cells. Because of the similarity of appearance, the sarcomatoid cancer cells can also easily be confused with the more typical sarcoma cancer cells.

Microscopic analysis normally shows a spindle cell or storiform structure with enlongated nuclei not as apparent as in the epithelial type. Sarcomatoid mesothelioma is so dangerous because it attacks and generally arises from support tissues such as bone, cartilage, muscle, and fat. Death usually occurs within six months of diagnosis of sarcomatoid mesothelioma.

Biphasic or mixed cell type Mesothelioma

Biphasic mesothelioma is not an independent type of mesothelioma. Biphasic mesothelioma is not a condition unto itself, as the name implies, is a combination of elements of both the epithelial and sarcomatoid subtypes, with components of each in the same tumor, or found in specific groupings throughout the tumor.

Approximately 20% to 40% of the mesothelioma cancer cells fall into the biphasic category. However, recent studies have suggested that biphasic mesothelioma accounts for 46% to 63% of all mesothelioma cancer cells.

Biphasic mesothelioma is different from epithelioid and sarcomatoid mesothelioma in that it does not have a unique cellular pattern. A section of tissue examined by a histopathologist may only contain epithelioid cancer cells, leading to a misdiagnosis of epithelioid mesothelioma. Multiple biopsies can help to avoid such mistakes and help lead to a correct diagnosis of biphasic mesothelioma.

When healthy cells start rapid division then Benign tumors form. This rapid pace of cellular growth leads to the formation of tumors as cells mass on top of one another, forming a solid lump of cells. Tumor cells are not all the same, which may be classified as benign or malignant.

There are important differences between malignant and benign tumor cells.

1. Benign mesothelioma – as the name indicates – A noncancerous tumor of the pleura. Malignant mesothelioma is a cancerous tumor of the lining of the lung and chest cavity (pleura) or lining of the abdomen (peritoneum) that is almost always caused by sustained exposure to asbestos.
2. Malignant tumors can invade nearby tissues and cause damage to healthy tissues and organs, whereas benign tumors do not invade nearby tissues, and do not spread to other parts of the body.
3. Malignant tumor cells can ‘relocate’ to other parts of the body by traveling through the blood or lymphatic system. When this occurs, these cells can begin forming new cancerous tumors in other locations.
4. Benign mesothelioma is much less serious than malignant mesothelioma.
5. Benign mesothelioma, also known as multicystic or fibrous mesothelioma. More recently referred to as a “solitary fibrous tumor of the pleura.

You can get all the types of Mesothelioma details on this blog.

Mesothelioma of the tunica vaginalis testis is the least common type of malignant mesothelioma. Testicular mesothelioma develops in the lining that surrounds the testicles, known as the tunica vaginalis, which provides protection and support for the reproductive organ. Since the testicles are the reproductive organs of the human body, it can be very dangerous if they are damaged by cancerous tumors. Most patients are in their 50s or older, but about ten percent of the patients are younger than 25 years.

More common testicular cancers include nonseminomas germ cell, seminomas germ cell or non-germ cell. Most frequently it is found as a palpable tumor, but it is also sometimes found during hernia repair. This finding can be associated with hydrocele, which is a fluid-filled sac surrounding the testicle, with or without a detectable mass. Testicular mesotheliomas are aggressive, and have a tendency to recur within two years, spreading to other areas such as nearby organs, lymph nodes, chest cavity, lungs, and the brain.

You can get all the types of Mesothelioma details on this blog.

Pericardial Mesothelioma is the rarest form of the asbestos-related cancer. Approximately 5 percent of all mesothelioma cases are pericardial. It is associated with long term exposure to asbestos fibres. This form of mesothelioma develops in the lining of the heart, known as the pericardium. The heart, as with any organ that requires constant movement to work properly, requires constant lubrication. Lubrication comes in the form of a thin layer of mucous, and in normal systems the heart beats on as normal.

As in the lung, the rapid growth of the cancerous tumors can cause expansion of the tissue and accumulation of fluid. The fluid can interfere with the functioning of the heart and cause chest pain. People in the fourth to seventh decades of life are most likely to have this cancer, and there is a 2:1 male to female ratio.

You can get all the types of Mesothelioma details on this blog.

Peritoneal mesothelioma is the second most common type of malignant mesothelioma. Peritoneal mesothelioma is the name given to the cancer that attacks the lining of the abdomen. Peritoneal mesothelioma is most often caused by the ingestion of carcinogenic asbestos fibers.

Comprising approximately 25 percent of mesothelioma cases, this form of mesothelioma develops in the lining of the abdominal cavity, known as the peritoneal membrane. The collection of cells surrounds the gastrointestinal tract and provides lubrication for the stomach and intestines to move so that they may function properly. These organs must be able to move properly in order to properly digest and process food, and a failure in the peritoneum can result in severe and debilitating consequences.

You can get all the types of Mesothelioma details on this blog.

Pleural mesothelioma is the most common type of malignant mesothelioma and affects the section of the mesothelium called the pleura. This is where the cancer affects the lungs and the protective lining and cavity of the lungs. The disease can grow quickly and enlarge the pleural space, causing it to fill with fluid. This fluid leads to the discomfort or pain associated with first detection of the disease. It is thought that pleural mesothelioma is caused by the inhaling of fibrous materials, including asbestos. These fibers lodge in the pleura and, over time, cause damage to the tissue layer and cancer erupts.

As a result, pleural mesothelioma is often confused with other types of diseases, such as lung cancer and viral pneumonia. Lung cancer can be caused by asbestos (asbestos lung cancer), though it differs from pleural mesothelioma in that it is a malignancy of the lung tissue itself, as opposed to pleural mesothelioma which is a malignancy of the tissue casing of the lungs. Viral pneumonia shares certain symptomatic similarities with pleural mesothelioma and is often misdiagnosed as such.

You can get all the types of Mesothelioma details on this blog.