Table 2

Pretreatment clinical stage by computed tomography (CT)a

TNM Stage(n)
T1N06
T2N032
T3N050
T2N17
T3N116
T3/T4N07
  • a Since 1994, Endo-esophageal ultrasound has been added to CT staging, and no patient was treated on this protocol with documented T4 invasion prior to therapy. Prior to that, if the CT scan suggested that the tumor abutted the aorta or bronchus without invasion, it was called T3/T4.