Doctors don't always come up with the right diagnosis. If they make up their mind that a condition is X, it's hard for them to think about other explanations--sometimes even in the face of evidence that contradicts their initial idea.

Diseases of the chest and the lining of the chest cavity (the peritoneum) can be very hard to diagnose. In one study a woman was found to have an artery blocked. Doctors assumed a heart condition, even though 3 months earlier she'd had fluid drained from her chest--one very important sign of mesothelioma. Doctors then performed a surgical procedure that removed the membrane surrounding the woman's heart, hoping this would give her some relief. At that point, when they examined the cells they'd removed, they finally reached a correct diagnosis that she was suffering from mesothelioma in the lining of her heart (pericardial).

Normally a biopsy is the best way to diagnose mesothelioma, but malignant mesothelioma cells can look like other kinds of cancer. Tumor tissue that's removed during biopsy must be submitted to special laboratory tests and, if necessary, examined with an electron microscope to confirm a diagnosis of mesothelioma. The important part is to have a physician who considers all the possibilities when you describe your symptoms.

If you know someone who has ever been exposed to asbestos fibers at work or elsewhere, and they suspect they may be having a heart problem, do them a favor. Help them find a physician who knows about all of the various symptoms that asbestos-related diseases can cause. Mesothelioma is a terrible disease, but with proper treatment some patients are able to gain extra time with loved ones.