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The cause of CIN is chronic infection of the cervix with HPV, especially infection with high-risk HPV types 16 or 18. It is thought that the high-risk HPV infections have the ability to inactivate tumor suppressor genes such as the p53 gene and the RB gene, thus allowing the infected cells to grow unchecked and accumulate successive mutations, eventually leading to cancer.
Cervical intraepithelial neoplasia (CIN), spanning a bit more than 2/3 of the thickness of the cervical epithelium. Intraepithelial neoplasia (IEN) is the development of a benign neoplasia or high-grade dysplasia in an epithelium. The exact dividing line between dysplasia and neoplasia has been very difficult to draw throughout the era of ...
[2] [4] Genetic factors also contribute to cervical cancer risk. [18] Cervical cancer typically develops from precancerous changes called cervical intraepithelial neoplasia over 10 to 20 years. [3] About 90% of cervical cancer cases are squamous cell carcinomas, 10% are adenocarcinoma, and a small number are other types. [4]
Cervical cancer is among the most common cancers worldwide, causing an estimated 604,000 new cases and 342,000 deaths in 2020. [1] About 90% of these new cases and deaths of cervical cancer occurred in low- and middle-income countries, where screening tests and treatment of early cervical cell changes are not readily available. [1]
Cervical cancer screening is a medical screening test designed to identify risk of cervical cancer. Cervical screening may involve looking for viral DNA, and/or to identify abnormal, potentially precancerous cells within the cervix as well as cells that have progressed to early stages of cervical cancer. [1] [2] One goal of cervical screening ...
Older women may also be underestimating their risk. Cervical cancer is most frequently diagnosed in women between the ages of 35 and 44, with the average age at diagnosis being 50, notes Diemert ...
The loop electrosurgical excision procedure (LEEP) is one of the most commonly used approaches to treat high grade cervical dysplasia (CIN II/III, HGSIL) and early stage cervical cancer discovered on colposcopic examination. In the UK, it is known as large loop excision of the transformation zone (LLETZ).
Cervical conization refers to an excision of a cone-shaped portion of tissue from the mucous membrane of the cervix. Conization is used for diagnostic purposes as part of a biopsy and for therapeutic purposes to remove pre-cancerous cells (cervical intraepithelial neoplasia) or early stage cervical cancer. [1] Types include: [2] [3]