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Br J Cancer. 2016 Aug 23;115(5):588-91. doi: 10.1038/bjc.2016.150. Epub 2016 Jun 2.

Conisation as a marker of persistent human papilloma virus infection and risk of breast cancer.

Author information

1
Department of Clinical Epidemiology, Aarhus University Hospital, Aarhus N, 8200 Aarhus N, Denmark.

Abstract

BACKGROUND:

Human papillomavirus (HPV) infection may increase breast cancer (BC) risk.

METHODS:

To examine this, we used nationwide medical registries to identify all Danish women who underwent conisation to remove HPV-associated cervical precancerous lesions (n=87 782) from 1978 to 2013. We computed the absolute risk of BC and standardised incidence ratios (SIRs) and 95% confidence intervals (95% CIs) for breast cancer, based on national breast cancer incidence rates.

RESULTS:

Conisation was associated with slightly increased BC incidence (SIR=1.1, 95% CI=1.0-1.1), and an absolute BC risk of 7.7% (95% CI=7.3-8.1%) in 35.9 years of follow-up. BC risk was elevated throughout follow-up, especially in the first 5 years (<1 year: SIR=1.2, 95% CI=0.92-1.5; 1-5 years: SIR=1.2, 95% CI=1.1-1.3; ⩾5 years: SIR=1.1, 95% CI=1.0-1.1). Women who underwent conisation and had autoimmune disease had elevated BC risk after 5 years of follow-up (SIR=1.4, 95% CI=1.0-1.8).

CONCLUSIONS:

BC risk is slightly elevated in women with persistent HPV infection, possibly due to detection bias.

PMID:
27253173
PMCID:
PMC4997534
DOI:
10.1038/bjc.2016.150
[Indexed for MEDLINE]
Free PMC Article

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