Table 10 -- Clues to Identifying an Individual with an Inherited Colon Cancer Syndrome
  • Colon cancer under the age of 45 years

  • Adenomas under the age of 40 years

  • Multiple colonic malignancies (at the same time or sequentially)

  • Multiple primary cancers (colon and non-colon)

  • >10 adenomas and a family history of colon cancer

  • Families with multiple closely related members who have had colon cancer

  • Families with colon cancer in more than one generation

  • Clustering of non-colon cancers in family members
    (particularly stomach, breast, thyroid, and uterine
    ).