If the specimen is taken, the specimen suggests cervical canal cells, suggesting that the cells taken are the cells in the cervical canal, called cervical canal cells. Only when cervical duct cells are obtained, the specimen will be qualified. Therefore, when we do cervical TCT, also called thin layer liquid-based cytology test, it is usually stated in the first item of the test report whether the cervical duct cells are obtained or not. Because cervical cancer occurs at the junction of columnar and squamous epithelium in the cervical canal, so for cervical cancer screening, the gynecologist must take the specimen from the cervical canal and get the cells at the junction of squamous and columnar epithelium before the specimen is qualified. Therefore, cervical canal cells is a term often used in cervical TCT. If cervical canal cells are obtained, it means the specimen is qualified.