It is characterized by nuclear enlargement and may also have any of the following: an irregular nuclear membrane, granular chromatin, centronuclear vacuolization, and pseudonuclear inclusions. Five subtypes are recognized: #Minimal atypia. #Early secretory pattern. #Secretory or hypersecretory pattern. #Regenerative, proliferative or nonsecretory pattern. #Monstrous cell pattern.
Arias-Stella reaction
Movat's stain
Jones' stain
Romanowsky stain
Wayson stain
Feulgen stain
Bielschowsky stain
Poppy seed test