Cervical ectropion
| Cervical ectropion | |
|---|---|
| Specialty | Gynaecology  |
Cervical ectropion (or cervical eversion) is a condition in which the cells from the 'inside' of the cervical canal, known as glandular cells (or columnar epithelium), are present on the 'outside' of the vaginal portion of the cervix. The cells on the 'outside' of the cervix are called squamous epithelial cells. Where the two cells meet is called the transformation zone, also known as the stratified squamous epithelium. Although having this condition is not an abnormality, it is indistinguishable from early cervical cancer. When at a routine check up, it can be seen by the doctor or nurse when a vaginal examination (or pap smear test) is done. The area may look red because the glandular cells are red. While many women are born with cervical ectropion, it can be caused by a number of reasons, such as:
- Hormonal changes, meaning it can be common in young women
- Taking 'the pill' to protect from pregnancy
- Pregnancy.
Formation
The squamocolumnar junction, where the columnar secretory epithelium of the endocervical canal meets the stratified squamous covering of the ectocervix, is located at the external os before puberty. As estrogen levels rise during puberty, the cervical os opens, exposing the endocervical columnar epithelium onto the ectocervix. This area of columnar cells on the ectocervix forms an area that is red and raw in appearance called an ectropion (cervical erosion). It is then exposed to the acidic environment of the vagina and, through a process of squamous metaplasia, transforms into stratified squamous epithelium.[1]
Causes
Cervical ectropion is a normal phenomenon, especially in the ovulatory phase in younger women, during pregnancy, and in women taking the oral contraceptive pill, which increases the total estrogen level in the body.[2] It also may be a congenital problem by persistence of the squamocolumnar junction which is normally present prior to birth.
Mucopurulent cervicitis may increase the size of the cervical ectropion.[3]
Symptoms
Cervical ectropion can be associated with excessive but non-purulent vaginal discharge due to the increased surface area of columnar epithelium containing mucus-secreting glands. It may also give rise to post-coital bleeding, as fine blood vessels present within the columnar epithelium are easily traumatised.
Treatment
Usually no treatment is indicated for clinically asymptomatic cervical ectropions. Hormonal therapy may be indicated for symptomatic erosion. If it becomes troublesome to the patient, it can be treated by discontinuing oral contraceptives, cryotherapy treatment, or by using ablation treatment under local anaesthetic. Ablation involves using a preheated probe (100 °C) to destroy 3–4 mm of the epithelium. In post-partum erosion, observation and re-examination are necessary for 3 months after labour.