Before revision: Example features Features that constitute atypia have different definitions for different diseases, but often include the following nucleus abnormalities: Enlargement Pleomorphism Nuclear polychromasia (variability in nuclear chromatin content.Page 27 in: Numerous mitotic figures Examples for Barretts esophagus In Barrett's esophagus, features that are classified as atypia but not as dysplasia are mainly: Nuclear stratification, wherein cell nuclei, which are normally located nearly at the same level between adjacent cells, are instead located at different levels.
After revision: (Polychromasia otherwise refers to a disease of immature red blood cells)Example features Features that constitute atypia have different definitions for different diseases, but often include the following nucleus abnormalities: Enlargement Pleomorphism Nuclear polychromasia (variability in nuclear chromatin content.Page 27 in: Numerous mitotic figures Examples for Barretts esophagus In Barrett's esophagus, features that are classified as atypia but not as dysplasia are mainly: Nuclear stratification, wherein cell nuclei, which are normally located nearly at the same level between adjacent cells, are instead located at different levels.