When this multiplication of cells occurs in an uncontrolled manner, forming lumps. These masses are called tumors.
There may be benign and malignant tumors. Benign tumors are those that do not spread to other areas and do not compromise a person’s life.

Malignant tumors often spread to other parts of the body and cause damage to body tissues and organs and can even cause death of the person.

Malignant cells can move through the lymph or blood and reach anywhere in the body causing a second tumor, called metastatic, because it is the first originated.

Lung cancer is an abnormal growth of lung cells. The disease usually occurs on the inner walls of the bronchi, and growing up can obstruct the airway and impair breathing. For this reason, generally produces shortness of breath, breathlessness and fatigue.

There are two main types of lung cancer: small cell cancer and non-small cell cancer. There is another type that has characteristics of both, and which is called mixed large cell carcinoma and small.

This report was prepared with the collaboration of Dr. Carlos Garcia Giron (Hospital General Yagüe de Burgos), the Spanish Group for Lung Cancer

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