Whole-body health checks now routinely include a low-dose CT chest, and a small, unexpected lung nodule is increasingly the result. The good news: most nodules under 8 mm are benign. The harder news: they still need a structured plan, not a wait-and-see attitude.
What a nodule actually is
A lung nodule is a small (≤30 mm), rounded opacity in the lung. Causes range from old healed infection and granuloma to benign tumours and, in a minority, early lung cancer. Size, shape, density and your smoking history together decide the risk category.
What we usually recommend
- Under 6 mm in a low-risk patient — usually no follow-up needed
- 6–8 mm — a follow-up CT at 6–12 months
- Over 8 mm or any suspicious feature — formal evaluation, often including PET-CT and tissue sampling
- Ground-glass nodules — longer follow-up because they grow slowly
Radial EBUS — sampling peripheral nodules safely
When a nodule is too small or too peripheral for a CT-guided biopsy, Radial EBUS lets us steer a tiny ultrasound probe through the airways to the nodule and biopsy it under direct guidance. It is minimally invasive, done as a day-care procedure under sedation, and avoids surgery in the majority of patients.
If you have been told you have a lung nodule, bring the CT disc — not just the report — to a pulmonology consultation. The right plan is almost always reassuring.
Concerned about your symptoms?
Book a consultation with Dr. Arun Gangadhar at Lung Care, RS Puram, Coimbatore.