Also it is very difficult to identify where the cancer started in the body and how it spread to the other parts of the body.

Cancer is often identified by the part of the body in which the tumor has been found and that is very unfortunate because it has been noticed that bone cancer may not have been caused ion the bone primarily and it could be somewhere else originally.

Tobacco causes lung cancer and it can affect many other parts like mouth, tongue, larynx, esophagus and lungs. Cancer tumor can occur anywhere in these parts.

Heavy drinking also might lead to lung or liver cancer and it works together with tobacco if the person also smokes. It can affect other parts like kidneys and pancreas.

High fat diet could also lead to cancer in many ways and obesity has been identified as a risk factor for several types of cancer.

People who have been diagnosed with these types of cancer fall into any of the above categories and each person has different set of problem associated with the lung cancer. For some people the type of lung cancer they suffer from is metastasis cancer in which the cancer had originated in some other part of the body but because of their smoking habit it has reached the lungs.

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