Lung cancer recurs after surgery in 30% to 75% of patients.
CT and PET-CT are crucial in identification of loco-regional recurrence.
Knowledge of potential pitfalls is essential, especially for parenchymal or nodal recurrence.
CT can diagnose metastases but further examinations (PET-CT, MRI) are often needed.
Morphological and functional imaging criteria may help in predicting recurrence.