The basics of the story may be true, but the story as it's written in the purple box isn't. First, there is no way they could have done a pap smear without seeing the tongue in the first place, as you have to insert a speculum to take the sample. Second there is no way she could have forgotten about it for a long period of time. It would eventually just fall out.
The story as explained in the next paragraphs makes alot more sense.