The 10 Scariest Things About Asbestos Mesothelioma: Difference between revisions

From MediaApe Wiki
Jump to navigation Jump to search
mNo edit summary
mNo edit summary
 
Line 1: Line 1:
Mesothelioma Mesothelioma Lung Cancer<br><br>Asbestos is a class of mineral fibers with fibrous structure. Exposure to asbestos is a significant risk factor for developing mesothelioma.<br><br>Construction, shipbuilding and the automotive industry are among the industries that are exposed to asbestos at work. The military is another risky sector.<br><br>Mesothelioma refers to cancer of the mesothelium, which forms a line around certain organs, such as the lungs. The most common type is pleural mesothelioma, which develops in the lining of the lung.<br><br>Signs and symptoms<br><br>Mesothelioma symptoms appear slowly and do not usually manifest until the cancer is advanced. It is important to be aware of the symptoms and consult your physician when you suspect any of them.<br><br>Mesothelioma is an uncommon and deadly condition caused by exposure to [https://library.kemu.ac.ke/kemuwiki/index.php/This_Is_The_What_Causes_Mesothelioma_Other_Than_Asbestos_Case_Study_You_ll_Never_Forget asbestos compensation], a group of microscopic fibers that were extensively used in many kinds of construction. It takes a long time for [http://www.letts.org/wiki/What_Is_Asbestos_Attorneys_Oklahoma_History_Of_Asbestos_Attorneys_Oklahoma asbestos] to cause damage, and the symptoms usually do not appear until the tumor has grown sufficiently large to press against organs nearby or spread to other parts of the body.<br><br>The symptoms of mesothelioma-related lung cancer are like those of other illnesses and conditions and therefore, patients should see their doctor if they notice any unusual changes in their health. These include chest pains, breathing difficulties and a persistent cough. Patients with mesothelioma might also experience fatigue and fever along with abdominal pain and weight loss due a lack appetite, and abdominal pain.<br><br>The most common form of mesothelioma is mesothelioma pleural, which occurs within the tissues that surround the lungs. It may also begin in the membrane that surrounds the organs of reproduction, such as the heart or reproductive ones. This is known as peritoneal mesothelioma. It can also start in less common places like the membrane that surrounds the lining of your stomach (abdomen) or the abdominal layers. cavity.<br><br>Other signs of pleural mesothelioma include shortness of breath, coughing and chest wall pain. Pleural effusion is an accumulation of fluid in the lung. Pleural plaques, or areas of thickened tissues on the surface of the lungs are a further problem.<br><br>The highest danger is for asbestos workers and those living with someone who has worked with asbestos. Anyone who has been exposed to asbestos should speak to their doctor to discuss a screening test that will detect evidence of asbestos-related diseases or mesothelioma. These tests could include an X-ray of the chest as well as the CT scan or a positron emission tomography (PET) scan.<br><br>Mesothelioma is difficult to identify because the initial symptoms are similar to other diseases. People who have an asbestos-related history should consult their physician if they are experiencing any of these symptoms, particularly in the event of a experience in the field of industrial work or military service, and have an ancestral history of asbestos-related cancers or other diseases.<br><br>Diagnosis<br><br>Mesothelioma, a deadly cancer, develops on the linings of a few organs. It is most often found in the lung (pleural mesothelioma) or the lining of the stomach (peritoneal mesothelioma), but can also be found in the heart (pericardial mesothelioma) and testicles (testicular mesothelioma). It takes several decades for mesothelioma's growth to manifest after exposure to asbestos. Therefore, symptoms may not be apparent until several years after exposure. It can be difficult for doctors to identify because symptoms are similar to those of other conditions. Mesothelioma can be difficult to identify because it is characterized by symptoms that are similar to other conditions.<br><br>Mesothelioma and lung cancer share similar symptoms, including difficulty in breathing. However, mesothelioma usually manifests as small, tiny nodules that develop into a sheath-like tumor around the affected organ. Lung cancer however is more prevalent in larger nodules, with clearer boundaries. In addition, mesothelioma doesn't grow as fast as lung cancer does, which could make diagnosis more difficult.<br><br>Doctors can perform various tests to determine if mesothelioma is present. A chest X-ray may reveal calcium deposits and thickening of the lungs. They may also conduct an CT scan with contrast, which shows cross-sectional images of the body that allow them to see more details. They can also carry out the procedure of thoracoscopic biopsy, in which they insert a tube into the lung and then remove a small amount of tissue for lab testing.<br><br>Mesothelioma is most often linked to [http://users.atw.hu/eliteg/index.php?PHPSESSID=bbfe64b29b348cc3a7e67bc883c0746c&action=profile;u=37699 asbestos compensation] exposure in the workplace. People who are exposed to asbestos in their work, such as those in the construction, shipbuilding and power generation industries have a higher chance of developing mesothelioma later in the course of their lives. Mesothelioma can also be a risk for those who haven't worked directly with asbestos, but have lived with someone who had.<br><br>It is essential to inform your doctor about any symptoms you are experiencing in the event that you have an exposure to asbestos in the past. Mesothelioma and other asbestos-related diseases are less difficult to treat when they are detected early. This is especially true for asbestosis pleural, which is found typically in the lining that surrounds the lungs.<br><br>Treatment<br><br>Mesothelioma, a rare form of cancer, is found in the linings of specific organs. The majority of the time, this type of cancer is found in the lung (pleura), but it can also occur in the lining of the abdominal cavity or chest wall. Mesothelioma can result from asbestos exposure, a grouping of minerals with microscopic fibers that produce dust or even powder when disturbed. Asbestos usually occurs as a result of exposure to occupational hazards like in the construction industry. The symptoms of mesothelioma appear similar to other diseases or conditions, and early diagnosis is essential.<br><br>Breathlessness, chest discomfort and dry coughing are all symptoms of mesothelioma. These symptoms may be similar to lung disease or other types of cancer. This is why mesothelioma can be incorrectly diagnosed.<br><br>A biopsy can be performed by any medical professional or doctor. This involves taking a small piece of tissue from the affected area and then examining it under a microscope to detect mesothelioma cells. A biopsy is the only way to determine mesothelioma.<br><br>Treatment options are determined by the mesothelioma cell type. For instance, pleural melanoma typically is comprised of epithelioid cells. In contrast, peritoneal mesothelioma contains sarcomatoid cells. It is also possible to have biphasic mesothelioma, which has both types of cells.<br><br>Treatment for mesothelioma has improved as doctors have become more aware of the dangers and symptoms of this disease. This cancer is still a deadly disease.<br><br>Patients with [http://xn--wh1bt3zwhi4lhm9b.com/bbs/board.php?bo_table=free&wr_id=81089 asbestos lawsuit]-related illnesses should discuss their risks with their doctor.<br><br>Doctors can test for mesothelioma with chest X-rays and CT scans, with intravenous contrast, to identify calcium deposits on the lung's lining. Doctors can also perform a procedure called a thoracentesis wherein fluid is removed from the lung space and the chest wall. If a patient is suffering from persistent lung issues and their doctor suggests the procedure of a thoracotomy. This is when a surgeon cuts the thoracic ribs, to examine the lung and other organs.<br><br>Prognosis<br><br>Mesothelioma, a cancerous tumor that develops in the tissue that covers the lungs or abdomen (peritoneum), or the heart (pericardium) is a rare kind of cancer. Asbestos is a group of mineral fibers that are strong and resistant to heat. It was used to make numerous different products like insulation, brakes, and shingles. Asbestos is frequently found in the workplace.<br><br>Mesothelioma symptoms early on can be similar to those of lung cancer, making it difficult to diagnose. It can take a long time between exposure to asbestos and the diagnosis. To determine if you have mesothelioma, must first see your GP and discuss any asbestos exposure that may have occurred in the past. Doctors can request imaging and blood tests to look for any abnormalities in the lung.<br><br>A chest X ray can help detect signs of mesothelioma such as calcium deposits in the lungs or the thickening of the pleura. Doctors can also use a CT scan with contrast to examine the lung and other organs within the. This type of X-ray makes use of a dye that is injected into the vein to highlight the lung tissue and other tissues. Doctors can also perform a procedure called thoracentesis, in which they remove fluid from the area between the chest and lungs. wall. The final step to identifying mesothelioma is a biopsy. It involves taking a small portion of the pleura affected and studying it in a laboratory.<br><br>The doctor will be able to determine the mesothelioma's stage according to the symptoms you present as well as the results of the tests you've taken and the growth of the tumor. The initial two mesothelioma stages are generally easier to treat than the later stages. The symptoms may not be apparent until the later stages and tumors are more likely to be spread to other parts of the body.<br><br>The type of mesothelioma you have as well as your history of asbestos exposure will determine if you're diagnosed with mesothelioma. Epithelioid is the most frequent type that accounts for 60% to 70%. Other types include sarcomatoid which is responsible for between 10% and 15% of cases, and mixed, in which both epithelioid-like and sarcomatoid-like cells are present.
Mesothelioma Mesothelioma Lung Cancer<br><br>Asbestos is one of the groups of mineral fibers with fibrous structure. Exposure is the primary risk factor for mesothelioma development.<br><br>People who are exposed at work include those working in shipbuilding, construction, and the automotive industry. The military is also a risky industry.<br><br>Mesothelioma, or cancer of the mesothelium that forms a line around certain organs, such as the lungs, is a cancerous disease. The most frequent type is pleural mesothelioma which is a cancer that occurs on the lining of the lung.<br><br>Signs and symptoms<br><br>Mesothelioma symptoms are slow-moving and usually don't manifest until the cancer is well advanced. It is crucial to be aware of the symptoms and consult your doctor if any of them are suspect.<br><br>Mesothelioma is a rare, but fatal illness is caused by exposure to asbestos. Asbestos was a collection of microscopic fibers widely employed in the construction industry. asbestos ([https://auntytabbyconnections.com/login/?action=failed&username=silashuckstep63&redirect_to Auntytabbyconnections link for more info]) can take years to cause damage, and the signs are usually not visible until the tumour is large enough to press against nearby organs or expanded to other organs.<br><br>The symptoms of mesothelioma are the same as other conditions and diseases. It is recommended that patients consult their physician if there any changes in their health. These include a persistent cough, breathing difficulties or chest pains. Mesothelioma patients might also experience fatigue, swelling, fever, an inability to eat and abdominal pain.<br><br>The most prevalent type of mesothelioma occurs in the tissues surrounding the lung. It can also start in the membrane covering the heart or reproductive organs. This is known as peritoneal Mesothelioma. Less commonly, it can start in other areas such as the membrane that surrounds the stomach's lining (abdomen) or the layers that are around the abdominal cavity.<br><br>Pleural mesothelioma can be associated with other symptoms, including shortness of breathing chest wall pain, coughing and a pleural effusion, which is the accumulation of fluid around the lungs. Pleural plaques, or regions of thickened tissue that covers the surface of the lungs are a different problem.<br><br>The highest risk is for asbestos-related workers and those living with someone who has worked with asbestos. Anyone who has been exposed to asbestos should speak to their doctor to discuss a screening test that will look for symptoms of asbestos-related disease or mesothelioma. These tests could include a chest X-ray, CT scan, or Postron emission Tomography (PET).<br><br>Mesothelioma is difficult to identify because the initial symptoms are so similar to other illnesses. If you have a history of asbestos exposure, it's important to see your doctor when you begin to experience symptoms. This is especially true when there is any history of industrial or military work or if there is a family history or [https://www.tiannayo.com/bbs/board.php?bo_table=free&wr_id=70413 asbestos case]-related diseases or cancer.<br><br>Diagnosis<br><br>Mesothelioma is a cancer that is aggressive that develops on the lining of certain organs. It is usually found in the lung lining (pleural) or stomach (peritoneal) but can also affect the heart (pericardial) and testicles. Asbest exposure can take several years to cause mesothelioma consequently, symptoms may not be apparent for many years. It is often difficult to identify due to the fact that symptoms are similar to other conditions. Mesothelioma can be difficult to identify because it is characterized by symptoms that are similar to other diseases.<br><br>Mesothelioma and lung cancer have similar symptoms such as breathing problems. Mesothelioma on the other side, is often seen as tiny nodules that expand to form a sheath like tumor around the affected organ. Lung cancer develops in nodules that are larger and have distinct boundaries. Furthermore, mesothelioma isn't able to expand as quickly as lung cancer does, which could make diagnosis more difficult.<br><br>Doctors can make use of a variety of tests to determine mesothelioma. They can take an X-ray of the chest that may reveal calcium deposits and thickening in the lung. They may also conduct CT scans that include contrast to see more detail. They can also perform a procedure called thoracoscopic biopsy, in which they insert a tube into the lungs and remove a sample of tissue to be tested in a lab.<br><br>Mesothelioma is most often linked to exposure to [http://www.nuursciencepedia.com/index.php/10_Things_We_Are_Hateful_About_Asbestos_Attorney asbestos lawsuit] in the workplace. People who are exposed to asbestos while at work, such as those working in the shipbuilding, construction and power generation industries have a higher chance of developing mesothelioma later on in life. Mesothelioma can also be a risk for those who haven't had direct contact with asbestos, but have lived with someone who had.<br><br>It is crucial to inform your doctor of any symptoms you're experiencing in the event that you have an asbestos-related exposure in the past. Mesothelioma and other asbestos-related diseases are easier to treat if they are diagnosed early. This is especially true for asbestosis pleural, which is found mostly in the lining of the lungs.<br><br>Treatment<br><br>Mesothelioma is a rare kind of cancer that develops in the linings of certain organs. This type of cancer usually develops in the linings of the lungs, but it can also develop in the wall of the chest or the abdominal cavity. Mesothelioma can be caused by asbestos exposure, which is a collection of minerals containing microscopic fibers that create dust or powder if disturbed. Asbestos is typically the result of exposure to occupational hazards like in the construction industry. It is crucial to identify [https://gamesontv.org/index.php/15_Bizarre_Hobbies_That_ll_Make_You_More_Successful_At_Mesothelioma_Asbestos_Claims asbestos claim] exposure early because mesothelioma symptoms are similar to those of other conditions or diseases.<br><br>Breathlessness, chest discomfort and dry coughing are the most common signs of mesothelioma. These symptoms can be similar to lung disease or other kinds of cancer. Because of this, mesothelioma can be not properly diagnosed.<br><br>A mesothelioma diagnosis is based on a biopsy, which can be done by a doctor or medical professional. The procedure involves taking a small portion of tissue from the affected area, and then looking at it under a microscope for mesothelioma cells. A biopsy is usually the only way to confirm a mesothelioma diagnosis.<br><br>Treatment options can be determined by the mesothelioma cell type. Pleural mesothelioma are typically composed of epithelioid whereas the peritoneal mesothelioma is the sarcomatoid. Biphasic mesothelioma is possible and contains both kinds of cells.<br><br>The treatment for mesothelioma has been getting better as doctors are able to recognize the symptoms and risks associated with this type of cancer. It is still an extremely dangerous disease.<br><br>Patients suffering from [https://wiki.dulovic.tech/index.php/A_Step-By-Step_Guide_To_Choosing_Your_Asbestos_Cancer_Law_Lawyer_Mesothelioma_Settlement asbestos litigation]-related illnesses should discuss their risk with their doctor.<br><br>Doctors can test for mesothelioma with chest X rays and CT scans, with intravenous contrast, which can reveal calcium deposits on the lining of the lung. A doctor can also carry out a procedure called a thoracentesis wherein fluid is eliminated from the space between lungs and the chest wall. A thoracotomy can be suggested by a physician if a patient has persistent lung issues. This is when a surgeon cuts the thoracic ribs to examine the lungs and other organs.<br><br>Prognosis<br><br>Mesothelioma is cancer that starts in the tissues that line the lungs (pleura), abdomen (peritoneum) or the heart (pericardium). Asbestos is one of the mineral fibers that are tough and resistant to heat. It was used in the production of various products, including insulation, brakes and shingles. Asbestos is often used in the workplace.<br><br>Mesothelioma symptoms early on can be similar to lung cancer, making it difficult to diagnose. It can take a long time between exposure to [http://sos1004.kr/bbs/board.php?bo_table=free&wr_id=129303 asbestos litigation] and diagnosis. The first step to diagnose mesothelioma is to visit a GP and discuss your previous exposure to asbestos. Doctors may request imaging and blood tests to check for abnormalities within the lungs.<br><br>A chest X-ray can help identify mesothelioma-related signs, for example, calcium deposits on the lungs or the pleura's thickness. A CT scan with contrast can be utilized by doctors to study the lungs and organs within. This kind of X-ray utilizes a dye injected into the vein to highlight the lungs and other tissues. Doctors can also perform the procedure known as thoracentesis, in which they remove the fluid from the region that lies between the lungs and the chest wall. A biopsy is the final step in diagnosing mesothelioma. It involves removing a tiny sample of the pleura that is affected and looking it up in a lab.<br><br>Doctors can determine what stage of mesothelioma you are in by analyzing your symptoms, the results of your tests, and the way in which the tumor develops. The initial two mesothelioma stages are usually easier to treat than later stages. Symptoms may not appear in the later stages, and the tumors are more likely to be spread to other parts of the body.<br><br>The type of mesothelioma you have as well as your history of exposure to asbestos will determine if you're diagnosed with mesothelioma. Epithelioid is the most frequent type that accounts for 60% to 70%. Other types include sarcomatoid mesothelioma, about 10 percent to 15% of cases and mixed mesothelioma where epithelioid as well as sarcomatoid cell types are present.

Latest revision as of 18:51, 3 October 2024

Mesothelioma Mesothelioma Lung Cancer

Asbestos is one of the groups of mineral fibers with fibrous structure. Exposure is the primary risk factor for mesothelioma development.

People who are exposed at work include those working in shipbuilding, construction, and the automotive industry. The military is also a risky industry.

Mesothelioma, or cancer of the mesothelium that forms a line around certain organs, such as the lungs, is a cancerous disease. The most frequent type is pleural mesothelioma which is a cancer that occurs on the lining of the lung.

Signs and symptoms

Mesothelioma symptoms are slow-moving and usually don't manifest until the cancer is well advanced. It is crucial to be aware of the symptoms and consult your doctor if any of them are suspect.

Mesothelioma is a rare, but fatal illness is caused by exposure to asbestos. Asbestos was a collection of microscopic fibers widely employed in the construction industry. asbestos (Auntytabbyconnections link for more info) can take years to cause damage, and the signs are usually not visible until the tumour is large enough to press against nearby organs or expanded to other organs.

The symptoms of mesothelioma are the same as other conditions and diseases. It is recommended that patients consult their physician if there any changes in their health. These include a persistent cough, breathing difficulties or chest pains. Mesothelioma patients might also experience fatigue, swelling, fever, an inability to eat and abdominal pain.

The most prevalent type of mesothelioma occurs in the tissues surrounding the lung. It can also start in the membrane covering the heart or reproductive organs. This is known as peritoneal Mesothelioma. Less commonly, it can start in other areas such as the membrane that surrounds the stomach's lining (abdomen) or the layers that are around the abdominal cavity.

Pleural mesothelioma can be associated with other symptoms, including shortness of breathing chest wall pain, coughing and a pleural effusion, which is the accumulation of fluid around the lungs. Pleural plaques, or regions of thickened tissue that covers the surface of the lungs are a different problem.

The highest risk is for asbestos-related workers and those living with someone who has worked with asbestos. Anyone who has been exposed to asbestos should speak to their doctor to discuss a screening test that will look for symptoms of asbestos-related disease or mesothelioma. These tests could include a chest X-ray, CT scan, or Postron emission Tomography (PET).

Mesothelioma is difficult to identify because the initial symptoms are so similar to other illnesses. If you have a history of asbestos exposure, it's important to see your doctor when you begin to experience symptoms. This is especially true when there is any history of industrial or military work or if there is a family history or asbestos case-related diseases or cancer.

Diagnosis

Mesothelioma is a cancer that is aggressive that develops on the lining of certain organs. It is usually found in the lung lining (pleural) or stomach (peritoneal) but can also affect the heart (pericardial) and testicles. Asbest exposure can take several years to cause mesothelioma consequently, symptoms may not be apparent for many years. It is often difficult to identify due to the fact that symptoms are similar to other conditions. Mesothelioma can be difficult to identify because it is characterized by symptoms that are similar to other diseases.

Mesothelioma and lung cancer have similar symptoms such as breathing problems. Mesothelioma on the other side, is often seen as tiny nodules that expand to form a sheath like tumor around the affected organ. Lung cancer develops in nodules that are larger and have distinct boundaries. Furthermore, mesothelioma isn't able to expand as quickly as lung cancer does, which could make diagnosis more difficult.

Doctors can make use of a variety of tests to determine mesothelioma. They can take an X-ray of the chest that may reveal calcium deposits and thickening in the lung. They may also conduct CT scans that include contrast to see more detail. They can also perform a procedure called thoracoscopic biopsy, in which they insert a tube into the lungs and remove a sample of tissue to be tested in a lab.

Mesothelioma is most often linked to exposure to asbestos lawsuit in the workplace. People who are exposed to asbestos while at work, such as those working in the shipbuilding, construction and power generation industries have a higher chance of developing mesothelioma later on in life. Mesothelioma can also be a risk for those who haven't had direct contact with asbestos, but have lived with someone who had.

It is crucial to inform your doctor of any symptoms you're experiencing in the event that you have an asbestos-related exposure in the past. Mesothelioma and other asbestos-related diseases are easier to treat if they are diagnosed early. This is especially true for asbestosis pleural, which is found mostly in the lining of the lungs.

Treatment

Mesothelioma is a rare kind of cancer that develops in the linings of certain organs. This type of cancer usually develops in the linings of the lungs, but it can also develop in the wall of the chest or the abdominal cavity. Mesothelioma can be caused by asbestos exposure, which is a collection of minerals containing microscopic fibers that create dust or powder if disturbed. Asbestos is typically the result of exposure to occupational hazards like in the construction industry. It is crucial to identify asbestos claim exposure early because mesothelioma symptoms are similar to those of other conditions or diseases.

Breathlessness, chest discomfort and dry coughing are the most common signs of mesothelioma. These symptoms can be similar to lung disease or other kinds of cancer. Because of this, mesothelioma can be not properly diagnosed.

A mesothelioma diagnosis is based on a biopsy, which can be done by a doctor or medical professional. The procedure involves taking a small portion of tissue from the affected area, and then looking at it under a microscope for mesothelioma cells. A biopsy is usually the only way to confirm a mesothelioma diagnosis.

Treatment options can be determined by the mesothelioma cell type. Pleural mesothelioma are typically composed of epithelioid whereas the peritoneal mesothelioma is the sarcomatoid. Biphasic mesothelioma is possible and contains both kinds of cells.

The treatment for mesothelioma has been getting better as doctors are able to recognize the symptoms and risks associated with this type of cancer. It is still an extremely dangerous disease.

Patients suffering from asbestos litigation-related illnesses should discuss their risk with their doctor.

Doctors can test for mesothelioma with chest X rays and CT scans, with intravenous contrast, which can reveal calcium deposits on the lining of the lung. A doctor can also carry out a procedure called a thoracentesis wherein fluid is eliminated from the space between lungs and the chest wall. A thoracotomy can be suggested by a physician if a patient has persistent lung issues. This is when a surgeon cuts the thoracic ribs to examine the lungs and other organs.

Prognosis

Mesothelioma is cancer that starts in the tissues that line the lungs (pleura), abdomen (peritoneum) or the heart (pericardium). Asbestos is one of the mineral fibers that are tough and resistant to heat. It was used in the production of various products, including insulation, brakes and shingles. Asbestos is often used in the workplace.

Mesothelioma symptoms early on can be similar to lung cancer, making it difficult to diagnose. It can take a long time between exposure to asbestos litigation and diagnosis. The first step to diagnose mesothelioma is to visit a GP and discuss your previous exposure to asbestos. Doctors may request imaging and blood tests to check for abnormalities within the lungs.

A chest X-ray can help identify mesothelioma-related signs, for example, calcium deposits on the lungs or the pleura's thickness. A CT scan with contrast can be utilized by doctors to study the lungs and organs within. This kind of X-ray utilizes a dye injected into the vein to highlight the lungs and other tissues. Doctors can also perform the procedure known as thoracentesis, in which they remove the fluid from the region that lies between the lungs and the chest wall. A biopsy is the final step in diagnosing mesothelioma. It involves removing a tiny sample of the pleura that is affected and looking it up in a lab.

Doctors can determine what stage of mesothelioma you are in by analyzing your symptoms, the results of your tests, and the way in which the tumor develops. The initial two mesothelioma stages are usually easier to treat than later stages. Symptoms may not appear in the later stages, and the tumors are more likely to be spread to other parts of the body.

The type of mesothelioma you have as well as your history of exposure to asbestos will determine if you're diagnosed with mesothelioma. Epithelioid is the most frequent type that accounts for 60% to 70%. Other types include sarcomatoid mesothelioma, about 10 percent to 15% of cases and mixed mesothelioma where epithelioid as well as sarcomatoid cell types are present.