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Cervical Cancer Screening Guidelines 2020

Cervical Cancer Screening Guidelines 2020

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  • Cervical cancer screening is recommended from the age of 25 to 65 years
  • American Cancer Society recommends Human Papillomavirus (HPV) test or cotesting every 5 years
  • Also, recommends cytology testing every 3 years, if HPV testing is unavailable
  • Cervical cancer screening can be stopped at the age of 65 if adequate cumulative negative tests are obtained within the past 10 years

Cervical cancer screening guidelines were updated by the American Cancer Society (ACS). They recommend less and more simplified screening procedures. The guidelines are published in the journal CA: A Cancer Journal for Clinicians.

What is Cervical Cancer?
Cervical cancer is a type of cancer that forms in the cells of the cervix. The most common types are squamous cell type (70%) and adenocarcinoma type (25%).

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Cervical Cancer Screening Guidelines 2020

Worldwide, cervical cancer is the fourth most common cancer cause in women. However, in developing countries, it is considered as the second most prevalent cancer in women.

Cervical Cancer and Human Papillomavirus (HPV)

Cervical cancer is caused by an infectious virus called human papillomavirus (HPV).

HPV is classified as high-risk and low-risk types based on their risk of causing cervical cancer:
  • High-risk HPV - HPV 16, 18, 31, 33, 34, 35, 39, 45, 51, 52, 56, 58, 59, 66, 68, 70
  • Low-risk HPV - HPV 6, 11, 42, 43, 44
HPV types 16 and 18 are the most carcinogenic types of HPV, as they are solely responsible for 70% of cervical cancer.

What are the Updated Cervical Screening Guidelines?

The updated cervical cancer screening guideline from the American Cancer Society recommends that women begin cervical cancer screening at the age of 25 and continue until the age of 65.

The preferred method of testing is the primary human papillomavirus (HPV) testing every 5 years. Primary HPV testing is HPV testing without Pap Test.

Since primary HPV testing is not available in all labs, cotesting every 5 years is also acceptable. Cotesting involves HPV test combined with Pap test.

HPV testing is generally considered more accurate compared to the Pap test. If only cytology testing is used, testing every 3 years is acceptable.

A negative HPV test is often associated with a very low cervical cancer risk.

Individuals older than 65 years with no history of CIN2+ within the past 25 years with adequate negative prior screening within 10 years, can stop cervical cancer screening with any modality.

CIN2+ is cervical intraepithelial neoplasia (CIN). It is a premalignant lesion and exists in three stages - CIN1, CIN2, and CIN3. CIN2 and CIN3 are collectively known as CIN2+. If the precancers are left untreated, they can progress to cervical cancer.

Adequate negative prior screening is 2 consecutive negative tests of either primary HPV or cotests and 3 consecutive negative cytology tests within the past 10 years.

If sufficient data is not met, individuals above the age of 65 should continue screening for cervical cancer until criteria are met.

Why is Cervical Cancer Screening Age Moved from 21 to 25 years?

The HPV vaccine is available for the past 15 years. Since then, the use of HPV vaccination has increased, and a drop in precancerous cervical changes was observed.

There are also potential harms associated with the treatment of precancerous cells, including preterm birth between 20-24 years. Screening has not shown to lower the rate of cancer in this age group. Thus, ACS changed the recommended screening age from 21 to 25 years.

Starting screening at the age of 25 can prevent 13% more cervical cancers and 7% more cervical cancer deaths compared to starting at 21 years old, according to Dr. Saslow. "Our model showed we could do that with a 9% increase in follow-up procedures, but with 45% fewer tests required overall."

In summary, the updated cervical cancer screening guidelines from the American Cancer Society recommend clear and simple screening procedures.

Source: Medindia

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