Cervical scrapes from a focus of AIS are often very cellular containing numerous sheets of glandular cells. This in itself should raise suspicion of glandular neoplasia unless the specimen has been taken with an endocervical  brush. In this slide the nuclei are crowded , hyperchromatic but their columnar shape can be readily recognised.Note the clean background. Sheets of normal endocervical epithelium were also found in the smear. Note clean background.