When do you add chemotherapy to post-operative RT for thymomas after a R2 resection?  

Complete resection is the most important prognostic factor in thymomas. Indeed, in multivariate analyses, it may be the only significant prognostic factor (Regnard et al. J Thorac Cardiovasc Surg, 1996). Post-operative radiation is commonly used for R1 and R2 resection. Recent data has questioned it...