Several local cancer treatment centers including Mercy’s Hoffberger center and the HopeWell facility in Lutherville will take part in National Cancer Survivors Day. The event was launched by Richard Block, co founder of the tax preparation firm H Block. After being diagnosed with terminal lung cancer in 1978 and told he had three months to live, Block dismissed the diagnosis, underwent two years of aggressive treatment and went into remission. The disease is triggered by the bite of a black…