Gardner's syndrome, diagnosis and treatment. Report on a family.

We have examined 15 members of a family with Gardner's syndrome. In the first and second generations, 4 (possibly 5) of 6 members died of cancer of the colon/rectum. Two of them were known to have plyposis coli. Three members of the third generation had the complete triad of Gardner's syndrome with polyposis coli, soft tissue and hard tissue tumours. Three of 5 children in the fourth generation, aged between 7 and 11 years, probably have polyposis coli, and 2 of them have stigmata of Gardner's syndrome. All members of any family with Gardner's syndrome should be examined regularly at 2--3 year intervals from an age of about 10 years until the diagnosis is established, or if polyposis does not develop, up to the age of 40 years. Proctocolectomy is recommended at the age of 18--20 years or later as soon as the diagnosis is determined.