Lung cancer: symptoms, risk factors, and prevention

Symptoms and risk factors of lung cancer

Lung cancer is the leading cause of cancer death. At early stages, there are usually no symptoms. Symptoms during later stages include cough, phlegm, blood sputum, wheezing, shortness of breath, chest pain, persistent lung infections, fatigue, and weight loss.

About twenty percent of lung cancers are fast growing and spreading, [...] http://digg.com/u1LFYU