Natural history of adenomas

One-third of individuals over the age of 55 years have single or multiple colorectal adenomas. During a subsequent period of 10 years, 3–5% of adenoma-bearing individuals will probably develop a carcinoma. The rather low conversion rate from benign to malignant disease indicates that most individuals with adenomas will never develop colorectal carcinoma. More knowledge is required to predict the outcome of the individual adenoma in a given patient. This will probably be obtained by increasing progress within gene technology and through large prospective follow-up studies of adenoma-bearing patients.RésuméA partir de 55 ans, on voit se développer chez un tiers de la population un ou plusieurs adénomes colorectaux. Dans les 10 ans à venir, 3 à 5% de ces patients adénomateux deviendront cancereux. Le taux plutôt bas de passage de l'adénome au cancer signifie que la plupart des individus ayant des adénomes n'auront jamais de cancer colorectal. Il faut élargir nos connaissances pour prévoir le devenir de chaque patient adénomateux. On y parviendra probablement grâce au progrès constant dans la technologie des gènes et grâce aux grandes études prospectives de suivi des patients à adénome.ResumenUna tercera parte de los individuos mayores de 55 años poseen adenomas Únicos o mÚltiples de la región colorrectal. En el curso del siguiente decenio, 3–5% de las personas con adenomas tienen la probabilidad de desarrollar un carcinoma. La relativamente baja tasa de conversión del adenoma benigno a neoplasia maligna indica que la mayoría de aquellas que tienen un adenoma jamás habrán de desarrollar carcinoma colorrectal. Se requiere mayores conocimientos para lograr predecir la evolución final del paciente con adenoma. Tales conocimientos probablemente serán obtenidos mediante el progreso en la tecnología genética y a través de amplios estudios prospectivos de seguimiento de los pacientes con adenomas.

[1]  E. E. Gresch Genetic Alterations During Colorectal-Tumor Development , 1989 .

[2]  C. Bremner,et al.  Polyps and carcinoma of the large bowel in the South African Bantu , 1970, Cancer.

[3]  H. Enterline,et al.  Polyps and cancer of the large bowel. , 1976, Current topics in pathology. Ergebnisse der Pathologie.

[4]  T. Eide Remnants of adenomas in colorectal carcinomas , 1983, Cancer.

[5]  H. Knoernschild GROWTH RATE AND MALIGNANT POTENTIAL OF COLONIC POLYPS: EARLY RESULTS. , 1963, Surgical forum.

[6]  V. Gilbertsen Proctosigmoidoscopy and polypectomy in reducing the incidence of rectal cancer , 1974, Cancer.

[7]  G. Stemmermann,et al.  Diverticulosis and polyps of the large intestine. A necropsy study of hawaii japanese , 1973, Cancer.

[8]  Dominant inheritance of adenomatous colonic polyps and colorectal cancer. , 1985, The New England journal of medicine.

[9]  V. Schmieden,et al.  Zur Klinik und Pathologie der Dickdarmpolypen und deren klinischen und pathologisch-anatomischen Beziehungen zum Dickdarmkarzinom , 1927, Deutsche Zeitschrift für Chirurgie.

[10]  B. Morson The pathogenesis of colorectal cancer. Introduction. , 1978, Major problems in pathology.

[11]  M. Vatn,et al.  The prevalence of polyps of the large intestine in Oslo: An autopsy study , 1982, Cancer.

[12]  M. D. M. Dr. Jeremy R. Jass B.Sc Do all colorectal carcinomas arise in preexisting adenomas? , 2005, World Journal of Surgery.

[13]  Nobuaki Sasano,et al.  Polyps and diverticulosis of large bowel in autopsy population of Akita prefecture, compared with Miyagi. High risk for colorectal cancer in Japan , 1976 .

[14]  K. He GROWTH RATE AND MALIGNANT POTENTIAL OF COLONIC POLYPS: EARLY RESULTS. , 1963 .

[15]  O. Kronborg,et al.  Follow-up after colorectal polypectomy. II. Repeated examinations of the colon every 6 months after removal of sessile adenomas and adenomas with the highest degrees of dysplasia. , 1983, Scandinavian journal of gastroenterology.

[16]  T. Eide,et al.  The age-, sex-, and site-specific occurrence of adenomas and carcinomas of the large intestine within a defined population. , 1986, Scandinavian journal of gastroenterology.

[17]  A. Lasser Synchronous primary adenocarcinomas of the colon and rectum , 1978, Diseases of the colon and rectum.

[18]  D W Day,et al.  Polyps and cancer of the large bowel: a necropsy study in Liverpool. , 1982, Gut.

[19]  H Shinya,et al.  Morphology, anatomic distribution and cancer potential of colonic polyps. , 1979, Annals of surgery.

[20]  Yrjö Collan,et al.  Prevalence of polyps in an autopsy series from areas with varying incidence of large‐bowel cancer , 1985, International journal of cancer.

[21]  S. Winawer,et al.  Inherited colon cancer: clinical implications. , 1979, The American journal of gastroenterology.

[22]  E. C. Hammond,et al.  Adenomatous lesions of the large bowel: An autopsy survey , 1979, Cancer.

[23]  T. Muto,et al.  The evolution of cancer of the colon and rectum , 1975, Cancer.

[24]  H. Stalsberg,et al.  Polyps of the large intestine in northern Norway , 1978, Cancer.

[25]  M. Vatn,et al.  Epidemiology of polyps in the rectum and colon. Recovery and evaluation of unresected polyps 2 years after detection. , 1986, Scandinavian journal of gastroenterology.

[26]  新谷 弘美 Morphology, anatomic distribution and cancer potential of colonie polyps : an analysis of 7000 polyps endoscopically removed , 1982 .

[27]  T. Muto,et al.  Small “flat adenoma” of the large bowel with special reference to its clinicopathologic features , 1985, Diseases of the colon and rectum.

[28]  T. Berge,et al.  Carcinoma of the colon and rectum in a defined population. An epidemiological, clinical and postmortem investigation of colorectal carcinoma and coexisting benign polyps in Malmö, Sweden. , 1973, Acta chirurgica Scandinavica. Supplementum.

[29]  N. Day,et al.  The distribution of cancer within the large bowel , 1972, International journal of cancer.

[30]  T. Eide Prevalence and morphological features of adenomas of the large intestine in individuals with and without colorectal carcinoma , 1986, Histopathology.

[31]  P. Correa,et al.  Cancer and „cancer related”︁ colorectal lesions in São Paulo, Brazil , 1978, International journal of cancer.

[32]  B. Trump,et al.  Carcinoma in situ in nonpolypoid mucosa of the large intestine report of a case with significance in strategies for early detection , 1985, Cancer.

[33]  S. Halter,et al.  De novo carcinoma of the rectum: a case report. , 1985, The American journal of gastroenterology.

[34]  D. Bhargava,et al.  Colorectal adenomas in a tropical country , 1988, Diseases of the colon and rectum.

[35]  T. Eide Risk of colorectal cancer in adenoma‐bearing individuals within a defined population , 1986, International journal of cancer.

[36]  P. Correa,et al.  Polyps of the colon and rectum in cali, Colombia , 1972, International journal of cancer.

[37]  E. E. Gresch Common inheritance of susceptibility to colonic adenomatous polyps and associated colorectal cancers. , 1989, The New England journal of medicine.