Cancer (Oncology)

Risk Factors for Lung Cancer

Risk factors are traits that may put people at greater risk of developing lung cancer.

Smoking tobacco is the leading risk factor responsible for nine out of 10 cases.

Secondhand Smoke
Nonsmokers who breathe the tobacco smoke of others are at increased risk.

Exposure to high indoor radon levels at home or work can damage lungs and lead to cancer. Radon is an odorless radioactive gas produced naturally by rocks and soil.

Inhaled asbestos particles can cause damage that leads to lung cancer or mesothelioma, a cancer that starts in the lining of the lung.


  • Main Hospital
  • 203-863-3000
  • Bendheim Cancer Center/ Cohen Pavilion
  • Medical Oncology: 203-863-3700
  • Radiation Oncology: 203-863-3701
  • Breast Center/ Cohen Pavilion
  • Appointments: 203-863-3031
  • General Questions: 203-863-4350
  • Bendheim Cancer Center at Valley Drive
  • 203-869-2111
  • Endoscopy Center
  • 203-863-3160
  • Greenwich Hospital Diagnostic Center/ Stamford , CT
  • 203-863-2870 
  • Greenwich Hospital Home Hospice
  • 203-863-3883