Thursday, March 4, 2010

What Is Malignant Mesothelioma?

Malignant mesothelioma is a cancer that starts in cells in the linings of certain parts of the body, especially the dresser or abdomen.

A layer of specialized cells titled mesothelial cells lines the inside of the chest, the abdomen, and the expanse around your heart. These cells also cover the outer opencast of most of your internal organs. The covering formed by these cells is titled mesothelium.

The mesothelium helps protect your meat by making a special lubricating changeful that allows meat to move around. For example, this changeful makes it easier for the lungs to move inside the dresser during breathing. The mesothelium has assorted obloquy in assorted parts of the body:

In the dresser it is titled the pleura.
In the abdomen it is titled the peritoneum.
In the expanse around the hunch it is titled the pericardium.
Tumors of the mesothelium crapper be non-cancerous (benign) or cancerous (malignant).

Malignant mesothelioma

A cancerous tumor of the mesothelium is titled a cancerous mesothelioma, although this is often simply short to meet mesothelioma. Mesotheliomas crapper move in 4 main areas in the body.

Pleural mesotheliomas move in the dresser cavity. They statement for most 3 out of 4 mesotheliomas.
Peritoneal mesotheliomas begin in the abdomen. They make most of the remaining cases.
Pericardial mesotheliomas move in the decay around the hunch and are rattling rare.
Mesotheliomas of the membrane vaginalis are rattling thin tumors that move in the covering layer of the testicles, which is actually an outpouching of peritoneum into the scrotum.
Malignant mesotheliomas crapper also be categorised into 3 types supported on how the cells are arranged when looked at low a microscope:

epithelioid: About 50% to 60% of mesotheliomas are of this type. It tends to hit a better outlook (prognosis) than the other types.
sarcomatoid (fibrous): About 10% to 20% of mesotheliomas are of this type.
mixed (biphasic): These mesotheliomas hit both epithelioid and sarcomatoid areas. They make up most 30% to 40% of mesotheliomas.

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