Colorectal cancer (CRC), also known as bowel cancer, colon cancer, or rectal cancer, is the development of cancer from the colon or rectum. Signs and symptoms may include blood in the stool, a change in bowel movements, weight loss, abdominal pain and fatigue. Most colorectal cancers are due to lifestyle factors and genetic disorders. Risk factors include diet, obesity, smoking, and lack of physical activity. Dietary factors that increase the risk include red meat, processed meat, and alcohol. Another risk factor is inflammatory bowel disease, which includes Crohn's disease and ulcerative colitis. Some of the inherited genetic disorders that can cause colorectal cancer include familial adenomatous polyposis and hereditary non-polyposis colon cancer; however, these represent less than 5% of cases. It typically starts as a benign tumor, often in the form of a polyp, which over time becomes cancerous.
Gardner's syndrome is a subtype of familial adenomatous polyposis (FAP). Gardner syndrome is an autosomal dominant form of polyposis characterized by the presence of multiple polyps in the colon together with tumors outside the colon. The extracolonic tumors may include osteomas of the skull, thyroid cancer, epidermoid cysts, fibromas, as well as the occurrence of desmoid tumors in approximately 15% of affected individuals.
Familial adenomatous polyposis (FAP) is an autosomal dominant inherited condition in which numerous adenomatous polyps form mainly in the epithelium of the large intestine. While these polyps start out benign, malignant transformation into colon cancer occurs when they are left untreated. Three variants are known to exist, FAP and attenuated FAP are caused by APC gene defects on chromosome 5 while autosomal recessive FAP is caused by defects in the MUTYH gene on chromosome 1. Of the three, FAP itself is the most severe and most common; although for all three, the resulting colonic polyps and cancers are initially confined to the colon wall. Detection and removal before metastasis outside the colon can greatly reduce and in many cases eliminate the spread of cancer.
Hereditary nonpolyposis colorectal cancer (HNPCC) is a hereditary predisposition to colon cancer.
Dartmouth Cancer Center (DCC) is a comprehensive cancer research center as designated by the National Cancer Institute. It is located at Dartmouth College and the Geisel School of Medicine in Hanover, New Hampshire. Its administrative offices are located within the Dartmouth-Hitchcock Medical Center in Lebanon, New Hampshire.
Small intestine cancer is a cancer of the small intestine. It is relatively rare compared to other gastrointestinal malignancies such as gastric cancer and colorectal cancer.
Polyposis registries exists for the purpose of understanding the genetic disease familial adenomatous polyposis. The registries provide a service to doctors for identification, surveillance and management of families and individuals with high colorectal cancer risk from Familial Adenomatous Polyposis (FAP) and Hereditary Non-Polyposis Colorectal Cancer (HNPCC). The Centers for Disease Control and Prevention of the United States provides, royalty-free, Registry Plus software for collecting and processing cancer registry data compliant with national standards established by health professionals and regulators to understand and address the burden of cancer more effectively.
Henry Thompson Lynch was an American physician noted for his discovery of familial susceptibility to certain kinds of cancer and his research into genetic links to cancer.
Gastrointestinal intraepithelial neoplasia is also known as gastrointestinal dysplasia. Gastrointestinal dysplasia refers to abnormal growth of the epithelial tissue lining the gastrointestinal tract including the esophagus, stomach, and colon. Pancreatic, biliary, and rectal Intraepithelial Neoplasia are discussed separately. The regions of abnormal growth are confined by the basement membrane adjacent to the epithelial tissue and are thought to represent pre-cancerous lesions.
Shuji Ogino is a molecular pathological epidemiologist, pathologist, and epidemiologist. He is currently Professor of Pathology at Harvard Medical School and Brigham and Women's Hospital, and Professor in the Department of Epidemiology at Harvard T.H. Chan School of Public Health. He is also Chief of Program in MPE Molecular Pathological Epidemiology at Brigham and Women's Hospital, and an associate member of Broad Institute of MIT and Harvard. He has been known for his work on establishing a new discipline, molecular pathological epidemiology, which represents an interdisciplinary science of molecular pathology and epidemiology.
Edith A. Pérez is a Puerto Rican hematologist-oncologist. She is the Serene M. and Frances C. Durling Professor of Medicine at the Mayo Clinic Alix School of Medicine.
Cancer prevention is the practice of taking active measures to decrease the incidence of cancer and mortality. The practice of prevention depends on both individual efforts to improve lifestyle and seek preventive screening, and socioeconomic or public policy related to cancer prevention. Globalized cancer prevention is regarded as a critical objective due to its applicability to large populations, reducing long term effects of cancer by promoting proactive health practices and behaviors, and its perceived cost-effectiveness and viability for all socioeconomic classes.
Curtis. C. Harris is the head of the Molecular Genetics and Carcinogenesis Section and chief of the Laboratory of Human Carcinogenesis at the Center for Cancer Research of the National Cancer Institute, NIH.
Elizabeth M. Jaffee is an American oncologist specializing in pancreatic cancer and immunotherapy.
Polymerase proofreading-associated polyposis (PPAP) is an autosomal dominant hereditary cancer syndrome, which is characterized by numerous polyps in the colon and an increased risk of colorectal cancer. It is caused by germline mutations in DNA polymerase ε (POLE) and δ (POLD1). Affected individuals develop numerous polyps called colorectal adenomas. Compared with other polyposis syndromes, Polymerase proofreading-associated polyposis is rare. Genetic testing can help exclude similar syndromes, such as Familial adenomatous polyposis and MUTYH-associated polyposis. Endometrial cancer, duodenal polyps and duodenal cancer may also occur.
Juvenile polyps are a type of polyp found in the colon. While juvenile polyps are typically found in children, they may be found in people of any age. Juvenile polyps are a type of hamartomatous polyps, which consist of a disorganized mass of tissue. They occur in about two percent of children. Juvenile polyps often do not cause symptoms (asymptomatic); when present, symptoms usually include gastrointestinal bleeding and prolapse through the rectum. Removal of the polyp (polypectomy) is warranted when symptoms are present, for treatment and definite histopathological diagnosis. In the absence of symptoms, removal is not necessary. Recurrence of polyps following removal is relatively common. Juvenile polyps are usually sporadic, occurring in isolation, although they may occur as a part of juvenile polyposis syndrome. Sporadic juvenile polyps may occur in any part of the colon, but are usually found in the distal colon. In contrast to other types of colon polyps, juvenile polyps are not premalignant and are not usually associated with a higher risk of cancer; however, individuals with juvenile polyposis syndrome are at increased risk of gastric and colorectal cancer. Unlike juvenile polyposis syndrome, solitary juvenile polyps do not require follow up with surveillance colonoscopy.
Nilofer Saba Azad is an American oncologist and physician-scientist specialized in gastrointestinal, colorectal, cholangiocarcinoma, and pancreaticobiliary cancers. She is a professor at the Johns Hopkins School of Medicine and oversees clinical trials at the Sidney Kimmel Comprehensive Cancer Center.
Monica Bertagnolli is an American surgical oncologist and the 17th director of the National Institutes of Health. She previously served as the 16th director of the National Cancer Institute (NCI). Prior to her governmental positions, she worked at Brigham and Women's Hospital and Dana–Farber Cancer Institute and was the Richard E. Wilson Professor of Surgery at Harvard Medical School.
Sonja Ingrid Berndt is an American pharmacologist and cancer epidemiologist who researches non-Hodgkin lymphoma, prostate cancer, and anthropometric traits that are cancer risk factors. She is a senior investigator in the occupational and environmental epidemiology branch at the National Cancer Institute.
Kathy J. Helzlsouer is an American oncologist, internist, and cancer epidemiologist who investigates cancer etiology and prevention, women's health, genetic counseling, and translational research. At the National Cancer Institute, she is the associate director of the epidemiology and genomics research program and chief medical officer for the division of cancer control and population sciences.
