Cervical intraepithelial neoplasia in young women

The Natural History of Cervical Intraepithelial Neoplasia Grades 1, 2, and 3: A Systematic Review and Meta-analysis

OBJECTIVE

The aim of the study was to obtain an updated overview of regression, persistence, and progression rates of conservatively managed cervical intraepithelial neoplasia grade 1 (CIN 1)/CIN 2/CIN 3.

METHODS

Data sources were MEDLINE, Embase, and Cochrane (January 1, 1973-April 14, 2020). Two reviewers extracted data and assessed risk of bias. To estimate outcome rates, we pooled proportions of the individual study results using random-effects meta-analysis, resulting in point estimates and corresponding 95% CIs. Heterogeneity was quantified by the I2 and τ2 measures.

RESULTS

Eighty-nine studies were included, 63 studies on CIN 1 (n = 6,080-8,767), 42 on CIN 2 (n = 2,909-3,830), and 7 on CIN 3 (n = 245-351). The overall regression, persistence, and progression to CIN 2 or worse and CIN 3 or worse rates for women with conservatively managed CIN 1 were 60% (95% CI = 55-65, I2 = 92%), 25% (95% CI = 20-30, I2 = 94%), 11% (95% CI = 8-13, I2 = 89%), and 2% (95% CI = 1-3, I2 = 82%), respectively. The overall regression, persistence, and progression rates for CIN 2 were 55% (95% CI = 50-60, I2 = 85%), 23% (95% CI = 19-28, I2 = 83%), and 19% (95% CI = 15-23, I2 = 88%), respectively. Finally, for CIN 3, these were 28% (95% CI = 17-41, I2 = 68%), 67% (95% CI = 36-91, I2 = 84%), and 2% (95% CI = 0-25, I2 = 95%), respectively. Cervical intraepithelial neoplasia grade 2 regression was significantly higher in women 30 years or younger and high-risk human papillomavirus-negative women (66%, 95% CI = 62-70, I2 = 76%; 94%, 95% CI = 84-99, I2 = 60%). Only 2/7,180 (0.03%) and 10/3,037 (0.3%) of the CIN 1 and CIN 2 cases progressed to cervical cancer.

CONCLUSIONS

Most CIN 1/CIN 2 will regress spontaneously in less than 24 months, with the highest rates in high-risk human papillomavirus-negative and young women, whereas progression to cancer is less than 0.5%. Conservative management should be considered, especially in fertile women and with expected high compliance. Given the heterogeneity in regression rates of high-grade histology, this should be classified as CIN 2 or CIN 3 to guide management.

Clinical Utility of Molecular Biomarkers in Cervical Squamous Intraepithelial Lesions in a Young Adult Population

OBJECTIVE

Although human papillomavirus (HPV) infection is necessary for cervical squamous intraepithelial lesion (SIL/CIN) and cancer to develop, exposure to HPV is not predictive of which women will develop SIL/CIN and cancer. This study examines mRNA expression of several potential biomarkers in exfoliated cervical cells collected from college-aged women.

MATERIALS AND METHODS

Freshman female students were recruited into the Carolina Women's Care Study, which was designed to prospectively evaluate factors that contribute to persistent HPV infections. One component of this study was to extract mRNA from exfoliated cervical cells. In this study, mRNA expression of Frizzled (FZD), growth differentiating factor 15, interleukin 1 beta (IL1β), and N-cadherin was assessed through real-time polymerase chain reaction. Statistical analysis was performed with a Student t test; all results were standardized with glyceraldehyde 3-phosphate dehydrogenase.

RESULTS

Fifty samples were selected that reflected the demographics of the Carolina Women's Care Study participants. IL1β mRNA expression was 9.4-fold higher in cervical cells from women with abnormal Pap tests (p = .0018); low-grade squamous intraepithelial lesion had 12.7-fold higher expression than negatives (p = .0011). The FZD mRNA expression was 5.7-fold higher in CIN 2 as compared with CIN 1 (p = .0041) and 8.5-fold higher compared with cytology/pathology negative (p = .0014). Other differences in mRNA expression showed trends but not reaching statistical significance for each condition.

CONCLUSIONS

It seems that several biomarkers involved in the cytokine/inflammatory pathway (IL1β), cell adhesion pathway (N-cadherin), growth factor (growth differentiating factor 15), and Wingless (WNT) signaling pathway (FZD) may be potential biomarkers in conjunction with the Pap test and HPV that help predict which women are at highest risk for developing CIN 3 and cervical cancer.

High-grade squamous intraepithelial lesion could be managed conservatively in women up to 25 years: results from a retrospective cohort study

OBJECTIVE

The aim of this study was to compare histologic findings and clinical outcomes of women up to 25 years with a high-grade squamous intraepithelial lesion (HSIL) compared to women older than 25 years.

MATERIALS AND METHODS

Sixty-three women up to 25 years and 245 women older than 25 years with HSIL, diagnosed from June 1991 to September 2008, were examined and treated following the official Spanish guidelines. Colposcopic and histologic findings and needs for treatment were recorded, and patients were followed up for a minimum of 12 months.

RESULTS

A total of 308 patients were evaluated; 63.49% of women up to 25 years and 77.10% of women older than 25 years with HSIL had cervical intraepithelial neoplasia (CIN) 2+ histology (p = .04). Also, 74.60% of women up to 25 years and 99.24% of women older than 25 years underwent an excisional procedure (p < .001). No significant or clinical differences were found in the 1-year follow-up outcomes (82.54% vs 78.37% had normal results; p = ns).

CONCLUSIONS

Women up to 25 years have less CIN 2+ histologic findings and less need for conization compared to older women. Our findings support the feasibility to design an adequate protocol for these younger women, which would be less aggressive and would, consequently, minimize obstetric long-term secondary effects.

Delaying Pap test screening in the adolescent population: an evidence-based approach

Cervical cancer screening guidelines have evolved significantly over the past ten years in the adolescent population. The objective of this article is to review the cervical screening guidelines in the adolescent population as well as examine the evidence and studies that support delaying screening until 21 years old. Delaying HPV and Papanicolaou testing until 21 years old is safe and will not increase cervical cancer rates in the adolescent population.