About Mesothelioma Diagnosis

Diagnosing mesothelioma is often difficult, because the symptoms are similar to those of a number of other conditions. Diagnosis begins with a review of the patient's medical history. A history of exposure to asbestos may increase clinical suspicion for mesothelioma. A physical examination is performed, followed by chest X-ray and often lung function tests. The X-ray may reveal pleural thickening commonly seen after asbestos exposure and increases suspicion of mesothelioma. A CT (or CAT) scan or an MRI is usually performed. If a large amount of fluid is present, abnormal cells may be detected by cytopathology if this fluid is aspirated with a syringe. For pleural fluid this is done by a pleural tap or chest drain, in ascites with an paracentesis or ascitic drain and in a pericardial effusion with pericardiocentesis. While absence of malignant cells on cytology does not completely exclude mesothelioma, it makes it much more unlikely, especially if an alternative diagnosis can be made (e.g.tuberculosis, heart failure).
If cytology is positive or a plaque is regarded as suspicious, a biopsy is needed to confirm a diagnosis of mesothelioma. A doctor removes a sample of tissue for examination under a microscope by a pathologist. A biopsy may be done in different ways, depending on where the abnormal area is located. If the cancer is in the chest, the doctor may perform a thoracoscopy. In this procedure, the doctor makes a small cut through the chest wall and puts a thin, lighted tube called a thoracoscope into the chest between two ribs. Thoracoscopy allows the doctor to look inside the chest and obtain tissue samples.
If the cancer is in the abdomen, the doctor may perform a laparoscopy. To obtain tissue for examination, the doctor makes a small incision in the abdomen and inserts a special instrument into the abdominal cavity. If these procedures do not yield enough tissue, more extensive diagnostic surgery may be necessary.
Typical immunohistochemistry results
PositiveNegative
EMA (epithelial membrane antigen) in a membranous distributionCEA (carcinoembryonic antigen)
WT1 (Wilms' tumour 1)B72.3
CalretininMOC-3 1
Mesothelin-1CD15
Cytokeratin 5/6Ber-EP4
HBME-1 (human mesothelial cell 1)TTF-1 (thyroid transcription factor-1)



Komentar →
Comments
0 Comments

0 comments:

Poskan Komentar

komentar anda sangat penting utk kemajuan blog ini.trimakasih utk kunjungannya...

◄ Posting Baru Posting Lama ►
 

tourist n stats

W3 Directory - the World Wide Web Directory My Ping in TotalPing.com
Google PageRank Checker Powered by  MyPagerank.Net

guest room

Copyright © 2012. CYBER MANADO - All Rights Reserved B-Seo Versi 3 by Bamz