1. Biology Dictionary
  2. Carcinoid

Carcinoid

Definition:

Carcinoid tumors are relatively uncommon neoplasms that nonetheless comprise up to 85% of neuroendocrine gastrointestinal neoplasms. They most frequently occur in the midgut and develop from neuroendocrine cells that are normally and diffusely present in this location. Most carcinoids are sporadic but epidemiological studies report a familial risk. Moreover, carcinoids can occur within the multiple endocrine neoplasia (MEN) syndrome, a rare familiar tumor syndrome in which mutations in the MEN1 gene are manifested. Recently, it has been shown that a majority (78%) of sporadic carcinoids display loss of heterozygosity for markers around the MEN 1 region, thus suggesting involvement of this gene in the pathogenesis of both familial and sporadic carcinoids.

Biomedical Dictionary

The Biomedical Dictionary is a comprehensive and professional collection of biological academic terms and subject datas. All explanations are supported by authoritative books or high impact factor literatures, and you can acquire accurate explanations of the biomedical terms you want to know.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z #