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Risk of vaginal cancer among hysterectomised women with cervical intraepithelial neoplasia: a population-based national cohort study.

Journal article
Authors Emilia Alfonzo
Erik Holmberg
Pär Sparén
Ian Milsom
Björn Strander
Published in BJOG : an international journal of obstetrics and gynaecology
Volume 127
Issue 4
Pages 448-454
ISSN 1471-0528
Publication year 2020
Published at Institute of Clinical Sciences, Department of Oncology
Institute of Clinical Sciences, Department of Obstetrics and Gynecology
Pages 448-454
Language en
Links dx.doi.org/10.1111/1471-0528.16028
www.ncbi.nlm.nih.gov/entrez/query.f...
Subject categories Cancer and Oncology

Abstract

To study the risk of vaginal cancer among hysterectomised women with and without CIN.Population-based national cohort study.All Swedish women, five million in total, aged 20 and up, 1987-2011 using national registries.The study cohort was subdivided into four exposure groups: hysterectomised with no previous history of CIN3 and without prevalent CIN at hysterectomy; hysterectomised with a history of CIN3/adenocarcinoma in situ (AIS); hysterectomised with prevalent CIN at hysterectomy; non-hysterectomised.Vaginal cancer.We identified 898 incident cases of vaginal cancer. Women with prevalent CIN at hysterectomy and those with CIN3/AIS history had incidence rates (IR) of vaginal cancer: 51.3 (34.3-76.5) and 17.1 (12.5-23-4) per 100 000, respectively. Age-adjusted IR-ratios (IRRs) compared to hysterectomised with benign cervical history, were 21.0 (13.4-32.9) and 5.81(4.00-8.43), respectively. IR for non-hysterectomised women was 0.87 (0.81-0.93) and IRR 0.37 (0.30-0.46). In hysterectomised with prevalent CIN, the IR remained high after 15 years of follow-up: 65.7 (21.2-203.6).Our findings suggest that hysterectomised women with prevalent CIN at surgery should be offered surveillance. Hysterectomised women without the studied risk factors have a more than doubled risk of contracting vaginal cancer compared with non-hysterectomised women in the general population. Still, the incidence rate does not justify screening.

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