On April 1, 1992, Otto Creutzfeldt would have celebrated his 65th birthday. About a year before, those of us who worked with him in the Department of Neurobiology decided to organize a meeting to honour Otto and his contri butions to neuroscience. Since Otto Creutzfeldt had no intention of retiring before his 67th birthday, this was not to be a "retirement conference" but a celebration on the occasion of a major anniversary. However. events turned out differently. In the spring of 1991, Otto Creutzfeldt became seriously ill, before we could consult with him on his suggestions for such a...