Cancer guide
Lung cancer
The leading cause of cancer death in the US — early detection with low-dose CT and biomarker-driven treatment have changed the outlook dramatically.
Symptoms of lung cancer
Early signs, which ones need a same-week doctor visit, and what screening looks like.
Read the symptoms guideWhat to ask after a lung cancer diagnosis
The questions that shape treatment — biomarkers, staging, surgery, chemo, second opinions.
Read the questions guideWhat to know first
- Low-dose CT screening is recommended for adults 50–80 with a significant smoking history.
- Biomarker testing (EGFR, ALK, ROS1, KRAS, PD-L1) is now standard.
- About 10–20% of lung cancers occur in people who never smoked.
When to see a doctor
- A cough that lasts more than 3 weeks or changes character
- Coughing up blood, even once
- Unexplained shortness of breath, chest pain, or weight loss
Related guides
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