Lung nodule found, what is the next step?

See a thoracic spec.: A ct scan would be needed and depending on that result, more tests would possibly be ordered. The size, other abnormalities that may be present, your smoking history, and overall condition can help guide what's next. This may include anything from a pet scan to needle biopsy to surgery. Seeing a thoracic specialist can help sort through where to go next.

Many pathways: Depends on age, size of nodule, history, and smoking history. Options include do nothing (rare), pet scan if there is risk for cancer, follow up cts at intervals determined by experienced md. Biopsies and surgery can come, but generally after above steps. Most nodules (>95%) are not cancer, and therefore invasive procedures should be reserved for when suspicion (guided by above factors) is high.