An injured party and their family have a time limit within which to bring a lawsuit to recover damages or losses relating to an injury. The time limit for doing so in the Province of Ontario is usually 2 years from when the claim was discovered or reasonably discoverable (the “limitation period”). Many assume that claims are discovered (and the limitation period begins to run) when the injury occurs. In medical malpractice lawsuits, however, this is not always the case.
http://otlablog.com/discovering-a-claim-of-medical-negligence/