Familial adenomatous polyposis (FAP) is characterized by the development of many tens to thousands of adenomas in the rectum and colon during the second decade of life. FAP has an incidence at birth of about 1/8,300, it manifests equally in both sexes, and accounts for less than 1% of colorectal cancer (CRC) cases. In the European Union, prevalence has been estimated at 1/11,300-37,600. Most pa...

BACKGROUND The dominantly inherited condition familial adenomatous polyposis (FAP) is caused by germline mutations in the APC gene. Finding the causative mutations has great implications for the families. Correlating the genotypes to the phenotypes could help to improve the diagnosis and follow-up of patients. METHODS Mutation screening of APC and the clinical characterization of 96 unrelated...

Cutaneous lesions consonant with Muir-Torre syndrome strongly suggest hereditary non-polyposis colorectal cancer (HNPCC). Ponti et al. discuss the importance of combining molecular genetic features of the sebaceous neoplasms, including microsatellite instability and immunohistochemistry, with family history, to determine the likelihood of HNPCC. Proof of diagnosis is identification of one of th...

The prevalence of colorectal adenoma in 23 affected patients with hereditary non-polyposis colorectal cancer (HNPCC) was compared with that in an age matched forensic autopsy population. The mean ages at diagnosis of colorectal cancer in men (13) and women (10) were 39 and 37 years respectively. In HNPCC patients who presented below the age of 50 years, at least one adenoma was found in 3 of 10...

46,551 participants 50 to 80 years of age were recruited from among volunteers for the American Cancer Socie~, fraternal, veterans, and employee groups in Minnesota between 1975 and 1977. Excluded from the study were persons with history of colorectal cancer, familial polyposis, or chronic ulcerative colitis, and persons who were bedridden or otherwise disabled. After stratification by age, sex...

BACKGROUND Relatives of patients with early onset colorectal cancer, a feature of hereditary non-polyposis colorectal cancer (HNPCC), are at increased risk of colorectal cancer. AIMS To investigate risk in relatives of patients with multiple primary cancers, another feature of HNPCC. METHODS Details were obtained on patients from one region who had developed colorectal cancer and a separate...

Molecular pathology is playing an increasingly important role in the treatment and overall management of patients with colorectal carcinoma. Three distinct genetic pathways have been identified that play a role in carcinogenesis: the chromosomal instability pathway, the microsatellite instability pathway, and the CpG island methylator phenotype pathway. Certain genetic mutations, some of which ...

Turcot Syndrome This section has been reviewed and approved by the Cancer.Net Editorial Board [1], December / 2011 Overview What is Turcot syndrome? Turcot syndrome is a condition in which cells become abnormal and form masses called polyps. A polyp is benign (noncancerous) but can eventually turn malignant (cancerous, meaning it can spread to other parts of the body). Turcot syndrome is rare a...

Overexpression of the receptor tyrosine kinase Met is an early event in the colorectal adenoma-carcinoma sequence. This suggests a link with disruption of adenomatous polyposis coli-controlled regulation of beta-catenin/T-cell factor (TCF)-mediated transcriptional activation, which is crucial in initiating tumorigenesis. Indeed, in intestinal biopsies from patients with familial adenomatous pol...

The conference covered several contemporary topics like apoptosis, angiogenesis and several interesting and insightful talks were presented by the delegates. The keynote addresses ' Cancer predisposition', on the opening day by Dr. HT Lynch, the father of lynch syndrome, a hereditary non polyposis colorectal cancer (HNPCC) is a highlight of the symposium. There were several talks on dietary inf...