Heather --
I can't speak to the likelihood-of-getting-cancer percentage you were given, but yes, dysplasia basically means that the cells are not normal but also not cancerous. Most dysplasia does not turn to cancer; in my husband's case, it did, but it was caught as early as it could be and still be called "cancer." Early detection DOES save lives.
So it's a very good idea for your husband to get regular checks -- and to continue getting them over the years.
I'm glad you found OCF -- the best place around for information and support. In addition to what you see on the message boards, you can learn a lot by looking through the pages on the
main OCF site.