Lynch syndrome

Pronunciation

Definition 1

An inherited disorder in which affected individuals have a higher-than-normal chance of developing colorectal cancer and certain other types of cancer, often before the age of 50. Also called hereditary nonpolyposis colon cancer and HNPCC. (NCI Dictionary)

Definition 2

An autosomal dominant hereditary neoplastic syndrome characterized by the development of colorectal carcinoma and a high risk of developing endometrial carcinoma, gastric carcinoma, ovarian carcinoma, renal pelvis carcinoma, and small intestinal carcinoma. Patients often develop colorectal carcinomas at an early age (mean, 45 years). In the majority of the cases the lesions arise from the proximal colon. At the molecular level, high-frequency microsatellite instability is present. (NCI Thesaurus)

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