Formerly called Necrosis; they released four Demo's with that name "Mastication and Heterodontism", "Masticating on Pathogenia", "Realms of Pathogenia", and "Necrosis".
Key songwriter and lead guitar player Jon Levasseur officially stated that he left the band in January of 2005. He obviously left a few months before, since guitarist Dan Mongrain was already filling in his spot at the November 2004 Trois-Rivières Metalfest IV show is on the DVD.
Lord Worm left the band in 1997 to become an English teacher, more specifically to teach it as a second language to adults, but returned in November of 2003. However, he left Cryptopsy again in April 2007 for health reasons.