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Mesothelioma Diagnosis & Tests - Cytology Unlike imaging tests, cytology is a pathological means to diagnosing malignant mesothelioma in patients, consisting of a fluid biopsy of abnormalities previously discovered. Once cytology is performed, the cells from the sample are examined to arrive at a diagnosis. There are two types of cytology that can be performed- Paracentisis and Thoracentisis. PARACENTISIS Paracentisis refers to a biopsy of fluid that has collected in the belly (peritoneal fluid). Apart from an interventional radiologist (IR) initially cleaning the area to be tested, there is no preparation for the procedure required from the patient. During Paracentisis, the patient will be under local anesthesia at the site of the targeted area. A needle will be injected into the targeted area being tested and will extract the fluid with which the cytology is to be performed. THORACENTISIS Thoracentisis refers to a biopsy of fluid that has collected within the pleur...

Mesothelioma Diagnosis & Tests - Biopsy While imaging tests can detect abnormalities, they don’t always identify exactly what the abnormalities are. For this reason, the findings of an X-ray, CT scan or both often lead to a pathological evaluation done via needle or surgical biopsy. With a biopsy, a tissue sample taken from the body will be reviewed under a microscope to determine if the tumor is benign (non-cancerous) or malignant (cancerous). The tissue will often be "stained" to determine the type of cancer and examined to determine the types of cells involved (epithelial, sarcomatoid, or mixed/biphasic). A biopsy is performed under local anesthesia. In some cases, sedation/analgesia may be needed. To prepare for the procedure, the patient must typically stop eating 6 hours before the biopsy, and they must abstain from smoking for 48 hours before the procedure. To begin, the patient will change into a hospital gown and an IV (intravenous line) will be pla...

Mesothelioma Diagnosis & Tests - PET Scans Some doctors may also order a positron emission tomography (PET) scan. The PET scan may reveal areas where there is abnormal, perhaps cancerous, tissue. PET scans are used in situations where there may be scar tissue present and are used in conjunction with CT scans in many cases. They are also often used to find the stage of cancer. With a PET scan, a radioactive substance is injected into the blood. This substance is usually a type of sugar related to glucose. After some time, the scanners can detect and will show images of the tissue that is interacting with the substance. Due to the quick growth activity of cancer cells, they absorb more of the injected substance compared to other healthy cells. Even though the picture results from a PET scan are not as detailed as a CT or MRI scan, they can provide doctors with very helpful information regarding if abnormal areas are cancerous or not. Many doctors use this test to see if the ...

Mesothelioma Diagnosis & Tests - CT Scans If after reviewing the chest x-rays the doctor would like to gather more information, they order a Computed Tomography Scan or more commonly referred to as a CT scan for further evaluation. CT scans are typically more conclusive than x-rays and they can also determine the location of any tumors and if fluid has built up around the lungs. Computed tomography (CT) scans are considered painless, noninvasive, and accurate. They also offer more details than X-rays. To prepare for a CT scan, the patient may be asked to avoid eating and drinking anything for several hours before the procedure and to wear comfortable, loose-fitting clothing. During CT scanning, the patient may be asked to lie on a table, which is part of a tunnel-like apparatus with a hole in the center. Several X-ray beams and a set of electronic X-ray detectors will rotate around the body, measuring the radiation being absorbed throughout the body. At the same time, the e...

Mesothelioma Diagnosis & Tests -  Chest X-Rays  One of the usual first steps to a mesothelioma diagnosis is a chest x-ray. A chest x-ray may show a buildup of fluid in the lining around the lung and is a quick procedure that requires no preparation. A chest X-ray is performed by a radiology technologist. Before the x-ray, the technologist may ask you to remove your clothing from the waist up and remove all jewelry or other objects containing metal. This can block images and compromise the test results. Your body will be positioned against the X-ray film and the technologist will take images from two positions: Back to front (called a posterior-anterior, or PA, view) The side (called a lateral view) Each of the positions only lasts just a few seconds so the x-rays are taken quickly. The amount of radiation from a chest X-ray is low—even lower than what you're exposed to through natural sources of radiation in the environment, says the Mayo Clinic. In short,...