Familial Cancer

, Volume 7, Issue 1, pp 27–39

Hereditary colorectal cancer syndromes: molecular genetics, genetic counseling, diagnosis and management

  • Henry T. Lynch
  • Jane F. Lynch
  • Patrick M. Lynch
  • Thomas Attard

DOI: 10.1007/s10689-007-9165-5

Cite this article as:
Lynch, H.T., Lynch, J.F., Lynch, P.M. et al. Familial Cancer (2008) 7: 27. doi:10.1007/s10689-007-9165-5


Hereditary forms of colorectal cancer, as is the case with virtually all forms of hereditary cancer, show extensive phenotypic and genotypic heterogeneity, a phenomenon discussed throughout this special issue of Familial Cancer. Clearly, the family physician, oncology specialist, genetic counselor, and cancer geneticist must know fully the complexity of hereditary cancer syndromes, their differential diagnosis, in order to establish a diagnosis, direct highly-targeted surveillance and management, and then be able to communicate effectively with the molecular geneticist so that an at-risk patient’s DNA can be tested in accord with the syndrome of concern. Thus, a family with features of the Lynch syndrome will merit microsatellite instability testing, consideration for immunohistochemistry evaluation, and mismatch repair gene testing, while, in contrast, a patient with FAP will require APC testing. However, other germline mutations, yet to be identified, may be important should testing for these mutations prove to be absent and, therein, unrewarding to the patient. Nevertheless, our position is that if the patient’s family history is consistent with one of these syndromes, but a mutation is not found in the family, we still recommend the same surveillance and management strategies for patients from families with an established cancer-causing germline mutation. Our purpose in this paper is to provide a concise coverage of the major hereditary colorectal cancer syndromes, to discuss genetic counseling, molecular genetic evaluation, highly targeted surveillance and management, so that cancer control can be maximized for these high hereditary cancer risk patients.


Colorectal cancerHereditary cancerHereditary nonpolyposis colorectal cancerLynch syndromeFamilial adenomatous polyposisHamartomatous polyposis syndromes



mismatch repair


familial adenomatous polyposis


attenuated familial adenomatous polyposis


hereditary breast and colorectal cancer


Peutz–Jeghers syndrome


familial juvenile polyposis


Cowden’s disease


Bannayan–Ruvalcaba–Riley syndrome

Copyright information

© Springer Science+Business Media B.V. 2007

Authors and Affiliations

  • Henry T. Lynch
    • 1
  • Jane F. Lynch
    • 1
  • Patrick M. Lynch
    • 2
  • Thomas Attard
    • 1
    • 3
  1. 1.Department of Preventive Medicine and Public HealthCreighton University School of MedicineOmahaUSA
  2. 2.Department of GI Medicine and NutritionUniversity of Texas MD Anderson Cancer CenterHoustonUSA
  3. 3.Pediatric GastroenterologyUniversity of Nebraska Medical CenterOmahaUSA