International journal of gynaecology and obstetrics: the official organ of the International Federation of Gynaecology and Obstetrics · 2012
Meta-analysis of the effectiveness of cryotherapy in the treatment of cervical intraepithelial neoplasia.
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Sauvaget Catherine, Muwonge Richard, Sankaranarayanan Rengaswamy
Аннотация
BACKGROUND: Cryotherapy can be used for the ablation of cervical intraepithelial neoplasia (CIN).
OBJECTIVES: To provide an updated and comprehensive estimate of the efficacy of cryotherapy for CIN.
SEARCH STRATEGY: A literature search identified original studies (randomized controlled trials and clinical reports).
SELECTION CRITERIA: Studies reporting cure rates, acceptability, and safety of cryotherapy were included in the analysis.
DATA COLLECTION AND ANALYSIS: Number of persistent or recurrent lesions at follow-up, adverse events, and complications were recorded. Quality of the methodology was also assessed. Meta-analyses were performed according to CIN thresholds, geographic region, study year, setting, study design, presence of endocervical involvement, freezing method, duration of follow-up, and status of the cryotherapy provider.
MAIN RESULTS: A total of 146 articles were retrieved; 77 papers--equivalent to 28,827 cases of treated CIN--were included in the meta-analysis. Cryotherapy achieved cure rates of 94.0% (CIN1), 92.0% (CIN2), and 85.0% (CIN3). Use of the double-freeze method and absence of endocervical involvement significantly increased cure rates. Minimal complications were reported as adverse effects.
CONCLUSIONS: Cryotherapy is an effective, safe, and acceptable treatment for CIN. It has been shown to be successful in low-resource settings, enabling availability and accessibility of early detection services.
OBJECTIVES: To provide an updated and comprehensive estimate of the efficacy of cryotherapy for CIN.
SEARCH STRATEGY: A literature search identified original studies (randomized controlled trials and clinical reports).
SELECTION CRITERIA: Studies reporting cure rates, acceptability, and safety of cryotherapy were included in the analysis.
DATA COLLECTION AND ANALYSIS: Number of persistent or recurrent lesions at follow-up, adverse events, and complications were recorded. Quality of the methodology was also assessed. Meta-analyses were performed according to CIN thresholds, geographic region, study year, setting, study design, presence of endocervical involvement, freezing method, duration of follow-up, and status of the cryotherapy provider.
MAIN RESULTS: A total of 146 articles were retrieved; 77 papers--equivalent to 28,827 cases of treated CIN--were included in the meta-analysis. Cryotherapy achieved cure rates of 94.0% (CIN1), 92.0% (CIN2), and 85.0% (CIN3). Use of the double-freeze method and absence of endocervical involvement significantly increased cure rates. Minimal complications were reported as adverse effects.
CONCLUSIONS: Cryotherapy is an effective, safe, and acceptable treatment for CIN. It has been shown to be successful in low-resource settings, enabling availability and accessibility of early detection services.