In 1985 a meeting of experts with an interest in polyposis syndromes was organised at Leeds Castle, an historic castle in Kent, UK. In 1989 the LCPG was formally established.
The ICG-HNPCC was conceived in Jerusalem, Israel, in 1989. In 1990 the first formal meeting of the ICG-HNPCC was held in Amsterdam, The Netherlands.
In 1997 the first joint meeting of LCPG and ICG-HNPCC took place in Noordwijk, The Netherlands. At the third joint meeting in Venice, Italy in 2001 it was agreed that the ICG-HNPCC should merge with the LCPG to form a new society – InSiGHT.
Articles describing the history of the two groups can be downloaded below.