No cervical canal cells, meaning that when a cervical liquid-based cytology is done, no cells are taken from the cervical canal, indicating that this specimen is not very comprehensive. Regular cervical liquid-based cytology tests for women with a history of sexual activity can lead to early detection and treatment of cervical cancer. When doing cervical liquid-based cytology, not only the exfoliated cells on the surface of the cervix are taken, but also the exfoliated cells inside the cervical canal, because cervical cancer may occur in the cervical canal. The results of cervical liquid-based cytology show no cells from the cervical canal, which means that the specimen is not very comprehensive, and there are no cells from the cervical canal, which makes it impossible to rule out lesions in the cervical canal. Because this specimen is not comprehensive, the result is not accurate. If there are symptoms such as contact bleeding, it is recommended that another cervical liquid-based cytology test be performed.