Do you ever offer adjuvant chemotherapy to patients with resected stage IB non-small cell lung cancer when the tumor is less than 4cm in size?   

4cm has historically been used as the cutpoint for determining benefit from adjuvant chemotherapy in this population (Strauss et al, JCO 2008; Butts et al, JCO 2010) 

However, a recent study in JTO by Morgensztern et al questions this: Morgensztern et al, JTO 2016