Canadian citizen Shona Holmes said in a commercial designed to frighten Americans about public healthcare that her life was threatened by delays in treatment under the Canadian healthcare system. Several have pointed out the gaps in her story: that she had a cyst, not a tumour, and that her eye-sight was threatened, not her life.
Shona Holmes' case, however, was also discussed in a wikipedia article about the Canadian Constitutional Foundation (CCF), a right-wing advocacy group that is funding her lawsuit against the Ontario government. The article has subsequently been deleted (a screen cap of the relevant section can be seen here), but in June 2008, an employee of the CCF added this to the article:
Shona Holmes was told she would lose her vision forever, unless surgeons immediately removed her growing brain tumour. But Ontario's government monopoly health care system told Shona whe would have to wait for months just to see specialists and obtain treatment. Not willing to risk permanent blindness, Shona obtained surgery at the Mayo Clinic in Arizona. Within ten days, her vision was completely restored.
Given that this description was written by a staff member of the group funding her lawsuit, it seems clear that Ms. Holmes has not been telling the same story to everyone.