All over world Lung cancer is the number one cause of cancer deaths among men and women.

Small cell lung cancer (SCLC) and non-small cell lung cancer (NSCLC) are the two major types of lung cancer, Non-small cell makes up about 80 to 90 percent of the cases; small cell, approximately 10 to 12 percent. or About 1 in 5 lung cancers are small cell, the rest are non-small cell.Both types of Lung Cancer arises from lung epithelial cells.non-small cell lung cancer (NSCLC) can be further classified into 3 main types Squamous cell carcinoma, Adenocarcinoma and Large cell carcinoma. Squamous cell carcinoma, is the commonest type of lung cancer. which develops in the cells which line the airways. This type of lung cancer is generally caused by smoking. Lung cancer can be develop in people who generally don't smoke, but this is much rarer.

General Symptoms of lung cancer can include a cough that won't go away easily, shortness of breath, hoarseness, chest pain, bloody or rust-colored sputum,a dull ache, or a sharp pain, when you cough or take a deep breath,loss of appetite and loss of weight, excessive tiredness (fatigue) and lethargy and recurring infections such as bronchitis and pneumonia.

Staging of lung cancer refers to the extent to which the cancer has spread in the body.

The following tests are generally used to diagnose Lung cancer. Your doctor may arrange for you to have one or more of them at the hospital.

CT (computerised tomography) scan
Spiral CT scan
Bronchoscopy
IF these test show positive results then doctor may go for another round of test which may includes MRI (magnetic resonance imaging) scan
Mediastinoscopy
Lung biopsy
PET (positron emission tomography) scan
Ultrasound scan
Isotope bone scan
Lung function tests

Treatment of lung cancer includes Surgery, radiotherapy and chemotherapy separately or together. Your doctor will plan your treatment by taking into account a number of things, including:

your general health
the type of lung cancer (small cell or non-small cell)
the size and position of the tumour
whether it has spread beyond the lung (its stage).
The general prognosis of lung cancer is poor, with overall survival rates of about 15% at 5 years.

Smoking cessation is the most important step that can prevent the growth of lung cancer in Human Body. products, such as nicotine gum, nicotine sprays, or nicotine inhalers, may be helpful to people trying to quit smoking. Minimal exposure to passive smoking is also an most effective preventive measure.