[A neoplastic process involving the epithelium of any part of the gastrointestinal tract. Morphologically it is characterized by the distortion of the normal architecture of the epithelial layer, dysplasia, and a loss of cell polarity. It is classified as low grade or high grade. Low grade intraepithelial neoplasia includes lesions with mild dysplasia and high grade intraepithelial neoplasia includes lesions with moderate or severe dysplasia, or carcinoma in-situ. ( NCI )]
UMLS (NCI) C0920207Gastrointestinal Intraepithelial Neoplasia
Gastrointestinal System Intraepithelial Neoplasia