What is the transformation zone in cervix?

What is the transformation zone in cervix?

Columnar cells are constantly changing into squamous cells in an area of the cervix called the transformation (transitional) zone. The transformation zone is an area of changing cells, and it is the most common place on the cervix for abnormal cells to develop.

Is transformation zone normal?

The transformation zone may be described as normal when it is composed of immature and/or mature squamous metaplasia along with intervening areas or islands of columnar epithelium, with no signs of cervical carcinogenesis (1.14a).

How do you find the transformation zone?

The outer extent of the transformation zone can be identified approximately based on the detection of the crypt opening or nabothian cyst farthest away from the SCJ. It sometimes corresponds to the borderline between yellow or patchy and dark mahogany brown iodine uptake.

What is a Type 1 transformation zone?

Type I – the whole TZ including all the upper limit is ectocervical. Type 2 – the upper limit of the TZ is partly or wholly visible in the canal and is completely visible around 360 degrees. Type 3 – part or the entire upper limit of the TZ cannot be seen in the canal.

What is Type 2 transformation zone?

Type 2 – the upper limit of the TZ is partly or wholly situated in the endo-cervical canal but is completely visible around 360 degrees of that limit.

Is cervical squamous metaplasia normal?

CLINICAL FEATURES. There are two types of squamous metaplasia of the urothelium, nonkeratinizing and keratinizing. The former is considered as a normal finding in females, present in the trigone and bladder neck in up to 85% of women of reproductive age and 75% of postmenopausal women.

What causes squamous metaplasia?

Factors in the initiation and promotion of squamous metaplasia are chronic irritation of a physical nature, such as that caused by an intrauterine contraceptive device (IUD), chemical irritants, inflammation with cell destruction, and endocrine changes at the beginning of, during, and after reproductive age.

What is Squamocolumnar junction of cervix?

The squamocolumnar junction (SCJ) (fig. 5) is defined as the junction between the squamous epithelium and the columnar epithelium. Its location on the cervix is variable. The SCJ is the result of a continuous remodeling process resulting from uterine growth, cervical enlargement and hormonal status.

What is transformation zone component?

Transformation zone component present. Another phrase that means your pap sampled cells both on the surface of your cervix and inside the canal. A thorough pap test! Transformation zone component absent.

What is a Type 2 transformation zone?

What is Type 2 cervix?

Moderately abnormal cells are found on the surface of the cervix. CIN 2 is usually caused by certain types of human papillomavirus (HPV) and is found when a cervical biopsy is done. CIN 2 is not cancer, but may become cancer and spread to nearby normal tissue if not treated.