There are several main types of throat cancer, and factors such as the pt's age and overall health status also need to be considered as well. In addition to discussing options such as delaying, reducing dosages, or omitting remaining chemo with his doctors, a second opinion might offer some reassurance as well. I suspect you will hear from the doc's that there will be some increased risk of recurrence if the chemo is not completed, although it may be minimal or hard to quantify. Ultimately the decision is the pt's. It is very challenging treatment to endure, with periods of discouragement and feeling very sick tending to be the norm, but it does end and recovery (from treatment) begins.