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Chinese Journal of Experimental and Clinical Infectious Diseases(Electronic Edition) ›› 2025, Vol. 19 ›› Issue (05): 307-311. doi: 10.3877/cma.j.issn.1674-1358.2025.05.007

• Short Reserch Article • Previous Articles     Next Articles

Influencing factors of post-biopsy regression of human papillomavirus-associated cervical intraepithelial neoplasia grade 3

Jianzhen Hao1, Wei Yi2,(), Yanqiu Luan1, Qiumei Su1, Hui Huang1   

  1. 1 Department of Gynecology and Obstetrics, Maternal and Children’s Healthcare Hospital of Beijing Dongcheng District, Beijing 100007 , China
    2 Department of Gynecology and Obstetrics, Beijing Ditan Hospital, Capital Medical University, Beijing 100015, China
  • Received:2025-01-02 Online:2025-10-15 Published:2025-12-24
  • Contact: Wei Yi

Abstract:

Objective

To investigate the incidence and influencing factors of lesion regression after biopsy of cervical intraepithelial neoplasia grade 3 (CIN3) associated with human papillomavirus (HPV) infection.

Methods

A retrospective analysis was performed on the clinical data of 240 patients who underwent colposcopic biopsy, diagnosed as CIN3 and subsequent cold knife conization at Maternal and Children’s Healthcare Hospital of Beijing Dongcheng District from January 1st, 2016 to December 31st, 2024. Cone pathology ≤ CIN1 was defined as CIN3 lesion regression; patients were divided into regression group (63 cases) and non-regression group (177 cases) based on whether CIN3 lesions regressed. Age, gravidity and parity, number of cervical quadrants involved, number of biopsies obtained, biopsy-conization interval, menopausal status, contraceptive methods, educational level, medical comorbidities, cytology and HPV screening results, types of transformation zone and performance of endocervical curettage (ECC) between two groups were compared, respectively. The influencing factors of CIN3 lesion regression were analyzed by multivariate Logistic regression analysis.

Results

The regression rate of CIN3 lesions after biopsy was 26.3% (63/240). Compared with non-regression group, patients in regression group had lower proportion of high-grade cytological lesions (χ2=12.671, P < 0.001), lower proportion of type 3 transformation zones (χ2=5.002, P=0.025), fewer involved quadrants (t=3.553, P=0.001) and longer biopsy-conization interval (t=-2.250, P=0.027), all with significant differences. Multivariate Logistic regression analysis showed that high-grade cytological lesions (OR=0.297, 95%CI: 0.130-0.679, P=0.004) and multi-quadrant involvement (OR=0.661, 95%CI: 0.455-0.962, P=0.030) were independent influencing factors for CIN3 lesion regression.

Conclusions

CIN3 patients with low-grade cytology (≤ low-grade squamous intraepithelial lesion) and localized lesions (≤ 2 quadrants) are more likely to experience lesion regression after biopsy.

Key words: Human papillomavirus, Cervical intraepithelial neoplasia grade 3, Colposcopy, Biopsy, Regression

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