Cervical cin grading

Cervical disease is currently a relatively common gynecological disease. There are many classifications of this disease after it occurs. The type of cervical disease that occurs in each person is completely different and cannot be generalized. Targeted treatment should be given based on the type of cervical disease you suffer from. This can control the disease and avoid unnecessary adverse reactions after taking the medicine.

The cervix is ​​located in the lower part of the uterus. It is approximately cone-shaped, 2.5 to 3 cm long, with the upper end connected to the uterine body and the lower end extending deep into the vagina. In layman's terms, as the name suggests, it means the cervix of the uterus, which connects the vagina and the uterus. The specific location is deep in the vagina, adjacent to the uterus.

The position of the external cervical os in the vagina determines the type of uterine displacement. Generally, the normal position of the uterus in an adult woman is slightly anteverted and flexed. "Inclination" refers to the angle between the long axis of the uterine body and the long axis of the vagina; "flexion" refers to the angle between the long axis of the uterine body and the long axis of the cervix. Normal anteversion means that the uterine body and the vagina form an inclination angle that is open forward and approximately right angles; normal anteflexion means that the uterine body and the cervix form a flexion angle of about 170° that is open forward. The external os and lips of the cervix are in contact with the posterior wall of the vagina. Various physiological or pathological factors may lead to changes in the angle of uterine "tip" and "flexion", resulting in different types of uterine displacement: anterior displacement (anteversion, anteflexion, anteversion-anteflexion), posterior displacement (retroversion, retroflexion, retroversion-retroflexion and horizontal position) and lateral displacement (lateral tilt, lateral flexion, lateral tilt and lateral flexion), etc.

The vault at the top of the vagina divides the cervix into two parts: the part of the cervix that protrudes into the vagina is called the cervicovaginal part, and the part above the vaginal vault is called the upper cervicovaginal part. The center of the cervix is ​​a long, fusiform lumen that is slightly flattened front to back. Its upper end is connected to the uterine cavity through the internal cervical os, and its lower end opens to the vagina through the external cervical os. The cervical canal is between the internal and external openings. The external cervical os is round in nulliparous women and transversely fissured in women who have given birth through vaginal delivery.

The size of the cervix and the ratio of the uterine body vary with age and endocrine status. The cervical wall is composed of the mucosa, muscularis and adventitia.

1. The cervical canal mucosa is the endocervix, which is covered by a single layer of columnar epithelium that secretes mucus. The epithelium sinks into adenoid crypts in the lamina propria, which are commonly called cervical glands. They can secrete mucus, which is the main component of leucorrhea.

2. There are reserve cells on the surface of the endocervical canal and below the glandular columnar epithelium and above the basement membrane, which have the potential for bidirectional differentiation: proliferation and differentiation into columnar epithelial cells and metaplasia into squamous epithelium;

The cervical os to the vaginal vault are all covered with stratified squamous epithelium