The Danish Lung Cancer Registry was queried to assess rates of nodal upstaging in patients resected for clinical stage I lung cancer undergoing open vs VATS resection.  VATS and open resections were equally distributed among over 1,500 pts.  Nodal upstaging was significantly more common after open compared to VATS lobectomy.  Survival rates did not differ.  Differences in nodal upstaging rates were likely related to factors that were not assessed in this study.