Mesothelioma is widely known as an aggressive, often deadly type of cancer. Part of the reason for this is that it can be hard to identify and diagnose. By the time it's found, it has already progressed to a late stage and treatment is difficult.
One issue is that people often do not know much about mesothelioma before they get it. It doesn't have the same type of name recognition as breast cancer or skin cancer, and so they don't even consider it at first.
One top of that, the symptoms may not appear all that unique initially. They include things like trouble breathing and fatigue. People may think they have other issues, never assuming things are as dire as they really are. They can put off treatment or doctors can prescribe treatments for mild conditions that they don't actually have.
In reality, mesothelioma is uncommon. In the United States, there are roughly 3,000 annual cases. This makes it no less dangerous, but that's why people don't know as much about it as they should. No one thinks it will happen to them.
Advanced tactics are needed to confirm that a person has mesothelioma. Right now, the only way to do it is with a biopsy. Using lesser diagnostic tactics could lead to mistakes.
If you believe you have contracted mesothelioma, especially if you've lived or worked around asbestos, get checked out by a medical professional. This can't be overstated. If tests are conclusive and you do in fact have this disease, then it's time to look into all of the legal options at your disposal.
Source: Mesothelioma and Asbestos Awareness Center, "Mesothelioma Awareness - Part 2: Problems of a Mesothelioma Diagnosis," accessed Feb. 16, 2018