Intraepithelial neoplasia

High grade anal intraepithelial neoplasia.

Intraepithelial neoplasia (IEN) is the development of a benign neoplasia or high-grade dysplasia in an epithelium. The exact dividing line between dysplasia and neoplasia has been very difficult to draw throughout the era of medical science. It varies between persons. In the localizations shown below, the term intraepithelial neoplasia is used to describe more accurately what was historically referred to as epithelial dysplasia. IEN is not cancer, but it is associated with higher risk for developing cancer in future. It is thus sometimes a precancerous condition.

Localizations

LocalizationUsual acronym
anal intraepithelial neoplasiaAIN
biliary intraepithelial neoplasiaBILIN
cervical intraepithelial neoplasiaCIN
endometrial intraepithelial neoplasiaEIN
gastrointestinal intraepithelial neoplasia[1]GIN
pancreatic intraepithelial neoplasiaPanIN
penile intraepithelial neoplasiaPEIN
prostatic intraepithelial neoplasiaPIN
vaginal intraepithelial neoplasiaVIN
vulvar intraepithelial neoplasiaVIN

References

  1. Schlemper, RJ; et al. (2000). "The Vienna classification of gastrointestinal epithelial neoplasia". Gut. 47 (2): 251–5. doi:10.1136/gut.47.2.251. PMC 1728018. PMID 10896917.


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