If there have been new developments, new research or discoveries, it won't really be the same information we had at the outset. However, yes, the case can be reopened based on this new information.
It can also be reassessed. A person may have an illness whose effects have been assessed at a certain percentage, such as 5% or 10% of functional loss. After that, the illness may evolve and then have more serious effects on the veteran. In that case, the person can contact us again to ask us to review their case on the grounds that their health has deteriorated.