DNA methylation as a triage marker for colposcopy referral in HPV-based cervical cancer screening: a systematic review and meta-analysis
Clinical Epigenetics volume 15, Article number: 125 (2023)
Screening plays a key role in secondary prevention of cervical cancer. High-risk human papillomavirus (hrHPV) testing, a highly sensitive test but with limited specificity, has become the gold standard frontline for screening programs. Thus, the importance of effective triage strategies, including DNA methylation markers, has been emphasized. Despite the potential reported in individual studies, methylation markers still require validation before being recommended for clinical practice. This systematic review and meta-analysis aimed to evaluate the performance of DNA methylation-based biomarkers for detecting high-grade intraepithelial lesions (HSIL) in hrHPV-positive women.
Hence, PubMed, Scopus, and Cochrane databases were searched for studies that assessed methylation in hrHPV-positive women in cervical scrapes. Histologically confirmed HSIL was used as endpoint and QUADAS-2 tool enabled assessment of study quality. A bivariate random-effect model was employed to pool the estimated sensitivity and specificity as well as positive (PPV) and negative (NPV) predictive values.
Twenty-three studies were included in this meta-analysis, from which cohort and referral population-based studies corresponded to nearly 65%. Most of the women analyzed were Dutch, and CADM1, FAM19A4, MAL, and miR124-2 were the most studied genes. Pooled sensitivity and specificity were 0.68 (CI 95% 0.63–0.72) and 0.75 (CI 95% 0.71–0.80) for cervical intraepithelial neoplasia (CIN) 2+ detection, respectively. For CIN3+ detection, pooled sensitivity and specificity were 0.78 (CI 95% 0.74–0.82) and 0.74 (CI 95% 0.69–0.78), respectively. For pooled prevalence, PPV for CIN2+ and CIN3+ detection were 0.514 and 0.392, respectively. Furthermore, NPV for CIN2+ and CIN3+ detection were 0.857 and 0.938, respectively.
This meta-analysis confirmed the great potential of DNA methylation-based biomarkers as triage tool for hrHPV-positive women in cervical cancer screening. Standardization and improved validation are, however, required. Nevertheless, these markers might represent an excellent alternative to cytology and genotyping for colposcopy referral of hrHPV-positive women, allowing for more cost-effective screening programs.
Currently, cervical cancer remains a significant public health concern at global level. Not only does it represent the fourth most incident malignancy in women (with an age-standardized incidence rate of 13.3 per 100,000 female individuals in 2020, worldwide), but also it is the third most deadly cancer (with an age-standardized mortality rate of 7.3 per 100,000 women in 2020 worldwide) . These figures, nonetheless, hide remarkable geographical differences, with cervical cancer-related deaths being more impressive in countries with low human development index . Although this may be partially explained by limited access to high-quality medical care, lack of effective preventive strategies, including screening, constitutes the major cause. Because cervical cancer is a preventable disease, screening strategies, based on cervical cytology and/or high-risk HPV (hrHPV) testing implemented at younger ages (below 30–35 years), detect with noticeable sensitivity and specificity the precancerous lesions amenable for treatment before overtly invasive cancer develops [2, 3]. The vast majority of cervical cancers are hrHPV-related, and the implication of this virus in cervical cancer pathobiology is well known, namely its effect on the transformation of epithelial surfaces like the squamous–columnar junction of the cervix or the lymph epithelium of the base of tongue and tonsils . In recent years, screening strategies have progressively focused on hrHPV testing as first-line screening test [5,6,7], owing to its higher sensitivity. However, hrHPV infections detected may also correspond to transient infection, and thus, this test is unable to specifically identify women which really need to be referred for a specialized consultation and undergo colposcopy-guided biopsy, a rather invasive procedure. Indeed, an accurate test which might identify clinically relevant hrHPV infections is key to reduce the number of unneeded referrals and interventions (with associated risks and costs) as well as hrHPV test repetitions [8, 9]. DNA methylation, the most studied epigenetic mechanism involved in gene expression regulation, has been successfully explored as a source of noninvasive disease biomarkers [10, 11]. Specifically, in cervical cancer, shifts in promoter methylation levels of several genes (both human and part of the HPV genome) have been associated with HPV status, lesion progression, and patient outcome [10, 11]. Despite a very promising performance demonstrated in individual studies, the fact is that such methylation-based tests have not moved from research to clinical practice, yet. Importantly, reports in the literature are characterized by heterogeneity of study settings, populations, methodological strategies, technicalities, and cutoff values used, among other variables, hampering a comprehensive overview of these tests’ performance and their real clinical usefulness, as well as the added value of comparing with standard methods like cytology and hrHPV genotyping .
In this systematic review and meta-analysis, we aimed to evaluate the performance of DNA methylation-based biomarkers for detecting high-grade intraepithelial lesions (HSIL), i.e., cervical intraepithelial neoplasia (CIN)2 + and CIN3+ in hrHPV-positive women and assess their potential as triage biomarkers in these women, to better ascertain their value in the context of cervical cancer screening. Furthermore, we identified the gaps that still preclude their translation into the clinics.
Our search retrieved 536 records in PubMed, 498 in Scopus, and 27 in Cochrane, achieving a total of 1061 records, 73 of which were duplicates (Fig. 1). From the remaining 988 publications, 852 were excluded after abstract and title review. Another 113 publications were further excluded: 11 did not use cervical smears/scrapes; 71 did not perform methylation analysis in a hrHPV-positive women setting (i.e., as triage); 8 studies did not test hrHPV in the samples used; 14 only presented hrHPV methylation; 4 performed DNA methylation analysis in only a subset of samples (e.g., CIN1 vs. CIN3); 4 did not allow for data extraction; and 1 disclosed a high level of overlap with another included study (B1) . Hence, 23 articles were included in the final analysis, and these are summarized in Table 1 and Additional file 1: Table S1.
Among these studies, one analyzed a population from 4 different countries and was thus considered as representing four independent studies , and two studies reported two sets of different samples, which were also considered independent [14, 15]. Although most of the studies (12/23) were conducted in the Dutch population [12,13,14,15,16,17,18,19,20,21,22,23], one also analyzed populations from Scotland, Denmark, and Slovenia . Four additional studies were conducted in European women [24,25,26,27], while 5 studies were conducted in the Chinese population [28,29,30,31,32], one in the Canadian population , and another in the Kenyan population .
Eight articles evaluated DNA methylation of cell adhesion molecule 1 (CADM1), TAFA chemokine-like family member 4 (TAFA4, also known as FAM19A4), mal, T cell differentiation protein (MAL), and microRNA 124-2 (miR124-2) genes in different combinations [12,13,14, 20,21,22,23, 33], whereas four studies only evaluated FAM19A4 methylation [17,18,19, 28]. Two studies assessed the performance of the S5 classifier [a methylation panel comprising erythrocyte membrane protein band 4.1 like 3 (EPB41L3), HPV16L1, HPV16L2, HPV18L2, HPV31L1, HPV33L2], one of which also included the evaluation of S4 classifier (EPB41L3, HPV16L1, HPV16L2, HPV18L2, HPV31L1) [25, 34]. EPBL41L3 methylation levels were assessed in three more studies alone, and different combinations with ankyrin repeat domain 18C, pseudogene (ANKRD18CP), rubicon-like autophagy enhancer (RUBCNL also known as C13orf18), junctional adhesion molecule 3 (JAM3), SRY-box transcription factor 1 (SOX1), telomerase reverse transcriptase (TERT), zinc finger and SCAN domain containing 1 (ZCAN1) [16, 27, 29]. C13orf18, JAM3, SOX1, and TERT were evaluated individually and in panels with different combinations of two genes, including slit guidance ligand 2 (SLIT2) gene . One study evaluated JAM3 methylation individually . Two more studies focused on methylation of distal-less homeobox 1 (DLX1), integrin subunit alpha 4 (ITGA4), relaxin family peptide receptor 3 (RXFP3), SRY-box transcription factor 17 (SOX17), and zinc finger protein 671 (ZNF671), and other also evaluated the methylation of ANKRD18CP. Both studies assessed the genes individually and as a panel [24, 26]. Furthermore, one study reported methylation levels of zinc finger protein 582 (ZNF582) individually and as part of a panel with paired box 1 (PAX1) . Lastly, one study assessed the methylation levels of achaete-scute family bHLH transcription factor 1 (ASCL1), LIM homeobox 8 (LHX8), and ST6 N-acetylgalactosaminide alpha-2,6-sialyltransferase 5 (ST6GALNAC5) in a panel .
Overall, 17 (74%) studies reported DNA methylation markers performance for both outcomes considered in this systematic review and meta-analysis (CIN2+ and CIN3+) [12,13,14,15,16,17,18,19,20,21,22, 24, 27, 29, 31, 32, 34]. Three (13%) studies only reported DNA methylation-based markers performance for CIN2+ outcome [25, 28, 33], and three (13%) more only reported DNA methylation-based markers performance for CIN3+ outcome [23, 26, 30]. Of note, 5 (22%) studies were conducted in self-collected samples [14, 15, 19, 21, 22]. Moreover, eight studies (35%) were referral population-based studies [14, 18,19,20,21,22,23, 27], eight studies (35%) were cohort studies [17, 24, 26, 28,29,30,31, 33], three (13%) were case–control studies [25, 32, 34], and four (17%) were convenience studies [12, 13, 15, 16].
Concerning methylation cutoffs, seventy-three percent of the studies disclosed a predefined cutoff for positivity [12,13,14,15, 17,18,19,20,21,22,23, 25,26,27,28,29,30, 34], mostly established through receiver operating characteristics (ROC) curve analysis in a training set or previous studies.
The quality of individual studies was assessed using QUADAS-2 and is summarized in Fig. 2 and Additional file 1: Table S2. The primary source of bias was patient selection. About 20% showed high patient selection bias, which was mainly associated with the design of the primary study. Nonetheless, the triage setting reported by some studies as a secondary outcome might also have led to bias.
Moreover, studies with high patient selection bias were associated with an enrichment of CIN2+ and or CIN3+ lesions, thus not representing a real population-based scenario. Most studies did not fully describe the women lost for follow-up or the interval between the methylation test and the reference test. Studies with high selection bias were removed from some of the analyses to evaluate the impact on biomarker performance (n = 7).
Diagnostic accuracy in an hrHPV-positive women triage setting
Diagnostic performance of the reported methylation markers was assessed, and the main performance indicators are depicted in Table 2. For both outcomes, CIN2+ and CIN3+ , sensitivity, specificity, and summary receiver operating characteristic (SROC) curve (Fig. 3) were pooled for: i) all the markers reported in all studies; ii) the best markers reported in each study (avoiding considering the same sample more than once); iii) the most frequently studied genes (CADM1, FAM19A4, MAL and miR124-2); and iv) studies which set the threshold to achieve 70% specificity. For CIN2+ detection, the pooled AUC was above 73% in all analysis models. Additionally, to evaluate the impact of bias, for analysis ii), high-bias studies were removed, and the outcomes were predicted (Table 2).
Considering only one entrance for the study, sensitivity and specificity for CIN2+ detection were 68% (CI 95% 63–72%) and 75% (CI 95% 71–80%), respectively. Furthermore, for CIN3+ detection, the pooled AUC was higher than 77% in all groups. For the best markers of each study, sensitivity reached 78% (CI 95% 74–82%), and 74% (CI 95% 69–78%) specificity was achieved. The pooled sensitivity and specificity of each study are further represented as a forest plot in Additional file 2: Figs. S1 and S2. When studies were stratified by study type, sensitivity and specificity were similar (Table 3).
The same was observed after excluding high-bias studies from the analysis (Table 2). Moreover, all analyzed models, except for model iv for CIN3+ detection, were associated with high and significant heterogeneity (Q with p-value ≤ 0.051 and I2 above 89%). A univariable meta-regression showed a significant correlation with cohort overlapping among studies, the use of one methylation panel, and the existence of a predefined cutoff (Additional file 2: Fig. S3) for both CIN2+ and CIN3 detection. Concerning CIN3+ detection, the type of sample (self-collected or not) was also found significant. When separately analyzed, studies with self-collected samples disclosed slightly lower performance for CIN 2 + [sensitivity: 63% (CI 95% 54–72%) vs. 70% (CI 95% 65–74%); specificity: 73% (CI 95% 63–81%) vs 76% (CI 95% 71–81%); AUC: 73% (CI 95% 69–77%) vs. 79% (CI 95% 75–82%)] and CIN3+ detection [sensitivity: 72% (CI 95% 63–80%) vs. 81% (CI 95% 76–85%); specificity: 70% (CI 95% 60–78%) vs. 75% (CI 95% 70–79%); AUC: 77% (CI 95% 74–81%) vs. 85% (CI 95% 82–88%)], comparatively to studies in which samples were collected by health professionals (Table 4).
The PPV and NPV values were calculated for all conditions reported above and are displayed in Table 5 and Additional file 2: Fig. S4, according to different prevalence ranges. For CIN2+ detection, the pooled prevalence varied between 25 and 35%, with a PPV between 0.446 and 0.620, and NPV always above 0.80. For a 30% prevalence, PPV ranged from 0.490 to 0.565, with an NPV remaining above 0.80. For CIN3+ detection, the PPV for the pooled prevalence ranged between 0.294 and 0.515, with an NPV above 90% for all conditions. For 20% prevalence, PPV was above 0.87 and NPV above 0.90.
Primary prevention of cervical cancer with a vaccine against hrHPV was an important step for hrHPV control and eradication. Nonetheless, secondary prevention still plays a crucial role in the reduction of incidence and mortality of cervical cancer, especially among unvaccinated women [35, 36]. First-line hrHPV testing for cervical cancer screening became the gold standard for many European countries at regional or national levels, as proposed by HPV Action Network from European Cancer Organisation in Viral Protection: Achieving the Possible. A Four-Step Plan for Eliminating HPV Cancers in Europe . However, this shift challenges the sustainability of screening programs, as the number of women referred to colposcopy significantly increased, mostly due to the limited specificity of hrHPV testing, with the identification of transient infection, and the failure to discriminate lesions with risk of progression from those in regression [37, 38].
In recent years, DNA methylation-based biomarkers have been investigated as potential tools for triage of hrHPV-positive cases, in an attempt to reduce the number of cases referred to colposcopy, avoiding overdiagnosis and consequent overtreatment. However, the evidence supporting the use of triage tests remains limited, as acknowledged by the latest Word Health Organization recommendations . Therefore, we conducted a systematic review with a meta-analysis to better understand the actual value of these DNA methylation-based biomarkers.
One of the major challenges (and limitations) of this meta-analysis results from the fact that distinct markers alone or combined in several panel have been reported along with different methodologies (including genes studied and methodological approach), with only a very small number of studies having used exactly the same protocols. Additionally, in some studies a histological biopsy was not performed when the co-test was negative, which might be a source of bias, although the reported risk of misclassification is rather low [40, 41]. Furthermore, some studies considered the women lost to follow-up as negative for CIN2+ lesion, which might be associated with lesion misclassification and, therefore, might have impacted in the estimated sensitivity and specificity.
Notwithstanding, focusing on the best markers reported from each study, DNA methylation markers reached, overall, a specificity similar to that reported for cytology [using atypical squamous cells of undetermined significance (ASC-US) as cutoff] for CIN2+ detection, although with slightly lower sensitivity . Concerning CIN3+ detection, methylation markers provided higher specificity with equivalent sensitivity, compared to cytology . Indeed, it is widely recognized that upfront knowledge of hrHPV positivity impacts on cytological observation and reporting, usually increasing sensitivity but with a decrease in specificity [42, 43]. Except for visual inspection using acetic acid (VIA), meta-analyses of the other recommended triage strategies (genotyping and cytology) displayed lower or similar specificity than that reported for methylation markers in this meta-analysis. VIA, however, disclosed lower sensitivity for CIN3+ detection .
CADM1, FAM19A4, MAL, and miR124-2 are the most commonly reported genes analyzed, although in different combinations. Six of the seven studies designed as referral population-based were conducted with these genes. However, most studies were conducted in the Dutch population, which may limit a broader application in clinical practice. Although FAM19A4 and miR124-2 methylation test has already received the Conformité Européene In Vitro Diagnostic (CE-IVD) label through QIAsure Methylation Test , concerns about its sensitivity have hindered its diffusion, especially for CIN2+ detection . Additionally, although GynTect® (comprising ASTN1, DLX1, ITGA4, RXFP3, SOX17, and ZNF671) has been approved for clinical practice, it was not yet included in WHO guidelines .
Interestingly, Kremer and co-workers reported the association between clinical regression of high-grade CIN and a negative result in the QIAsure Methylation test . In this study, women referred for colposcopy with biopsy-confirmed CIN2/CIN3 were monitored every six months during 24–30 months to evaluate clinical regression or progression of HSIL. Importantly, about 75% of women enrolled were under 35 years, i.e., at reproductive age, in which fertility preservation is of utmost importance . Clinical regression was observed in 58% of recruited women, whereas clinical progression occurred in only 22%. Remarkably, a negative methylation result at baseline was associated with an increased likelihood of clinical regression. When combined with the cytological findings [ASC-US or low-grade squamous intraepithelial lesion (LSIL) or negative HPV16 genotyping (HPV16¯)] clinical regression incidence exceeded 85% . Moreover, a report on risk stratification for hrHPV+ women with ASC-US/LSIL from the same team demonstrated that a double positive test (methylation and HPV 16/18 genotyping) associated with higher risk of CIN3+ incidence compared to a single positive result (methylation or HPV 16/18 genotyping). Furthermore, a double negative result associated with CIN3+ incidence risk under 10% . Thus, methylation analyses might identify cases more likely to endure regression. Importantly, studies with self-collected samples demonstrated a slightly lower performance. Of note, most of these studies were population-based, which might be less prone to bias design. FAM19A4 methylation showed similar performance in self-collected and heath professional-collected samples [18, 19]. Moreover, the study of Kremer et al. also demonstrated similar test performance for clinician- and self-collected samples, encouraging the adoption of this strategy for recruitment of women non-adherent to screening programs, increasing screening uptake as proposed by HPV Action Network 2 and allowing for fully automated molecular testing pipeline.
Furthermore, Kelly et al.  also demonstrated the value of methylation markers for cancer detection (not restricted to hrHPV-positive women). Overall, methylation markers disclosed 63% and 71% sensitivity and 76% and 75% specificity, for CIN2+ and CIN3+ , respectively . These results emphasize the benefit of using methylation markers for cervical cancer screening.
In conclusion, this systematic review and meta-analysis confirmed that DNA methylation-based markers constitute a promising tool for hrHPV-positive women in cervical cancer screening programs as its higher specificity complements the high sensitivity of hrHPV testing. In addition to decreased overdiagnosis and consequent overtreatment, increasing quality of life and reducing healthcare costs, this strategy may also contribute to decrease pressure upon colposcopy units, improving sustainability and waiting times. Cervical cancer screening program evolution over the decades has been constant, in search of the optimal balance between effectiveness and reliability. Methylation markers may well be the next advancement, improving adhesion, cost-effectiveness, and quality of life.
Studies which reported DNA methylation according to cervical lesions or sensitivity and specificity of the DNA methylation-based assays for detecting the outcome in the hrHPV-positive women population were included in this meta-analysis. Additionally, a histological endpoint of HSIL or higher [CIN2+ or CIN3+ , which can include carcinoma in situ and invasive cervical carcinoma (ICC)] was required for the study inclusion.
Search strategy and selection process
PubMed, Scopus, and Cochrane databases were searched for publications until March 31, 2021. No other databases or gray literature was used. The detailed search strategies for the three databases are provided as supplementary material (Additional file 2). All titles and abstracts were screened by two independent authors (SS and JL). Full-text copies of the remaining publications were obtained, and eligibility was assessed by the same two authors. A third author (BM) solved the discrepancies in publication eligibility. Each study was identified with an ID code composed by a letter (corresponding to the publication year) and a sequential number to facilitate the identification of the manuscript by the authors. Missing numbers in the identification correspond to excluded articles.
Inclusion and exclusion criteria
Since we aimed to evaluate the performance of DNA methylation-based assays as a triage test in hrHPV-based primary cervical cancer screening, we only included studies in which cervical swabs/scrapes from hrHPV-positive women were used. Studies that only employed DNA methylation as a primary setting or as triage after an abnormal cytology result were excluded. Studies that only compared a few groups of lesions [e.g., CIN1 vs. ICC] were excluded as they did not mimic the cervical cancer screening program context. Moreover, studies that reported solely the DNA methylation percentage without any estimation for CIN2+ or CIN3+ detection were excluded, as well as those studies reporting DNA methylation only for one type of hrHPV since the results could not be applied to all hrHPV-positive women in cervical cancer screening programs. Only original studies written in Portuguese or English were included.
From the final list, a standardized form was developed for data collection by two independent authors (SS and JL). Any discrepancies were solved by a third author (BM). Detailed information about collected variables is provided as supplementary material. DNA methylation single markers and/or combinations of markers were considered independently when provided. True positives (TP), false positives (FP), true negatives (TN), and false negatives (FN) were extracted for both outcomes (CIN2+ and CIN3+). When not clearly reported, TP, FP, TN, and FN were calculated based on sensitivity and specificity reported in the corresponding manuscripts, following the formulas: sensitivity = TP/total of cases (TP + FN), and specificity = TN/total of controls (TN + FP). When a discrepancy was found between reported and calculated parameters, or when these performance variables could not be calculated, authors were contacted for clarification. Each study was also classified according with the used referral population (if a population-based selection was performed for sample selection, representing a screening program context), cohort (if sample selection was performed based only on hrHPV status), case–control (if samples selection was based on the histological outcome), or convenience (if the studies used a selection of samples from a previous population-based study).
When available, the TP, FP, TN, and FN were extracted using the predefined cutoff of each study. When multiple cutoffs from the ROC curves were available, a predefined 70% specificity was chosen for TP, FP, TN, and FN assessment. Estimated pooled sensitivity and specificity were calculated using a bivariate model in STATA (metandi and midas). In this approach, sensitivity and specificity are pooled as joined variables considering any correlation that might exist between the variables through a random-effect model [47,48,49]. Moreover, SROC analysis was performed, and the area under the curve (AUC) was estimated. Additionally, subgroup analyses were made for sensitivity and specificity for CIN2+ and CIN3+ outcomes. Univariate meta-regression was performed for the type of sample (self-collected vs. clinician-collected), cohort overlap among studies, methylation panel (multiple vs. single gene analysis), and the existence of predefined cutoff for methylation levels.
Since prevalence highly influences biomarker performance, PPV and NPV were estimated based on pooled sensitivity and specificity. A bivariate random-effect model (predv_r from mada package) was employed using R software instead of pooled likelihood ratios[50,51,52]. PPV and NPV values were estimated for prevalence ranging between 5 and 60% for CIN2+ and CIN3+ detection [47, 53].
Two authors (SS and JL) assessed the quality of studies using the QUADAS-2  tool. Discrepancies were solved by a third author (BM). Bias was assessed based on: participant selection (population characteristics, inclusion and exclusion criteria, and proportion of women with CIN2+ /CIN3+ included), index test description (DNA methylation assessment description and cutoff for methylation positivity), and reference test (histological confirmation assessment). Additional file 1: Table S2 depicts the quality assessment for all the included studies.
This analysis is reported according to the Preferred Reporting Items of Systematic Reviews and Meta-analysis of Diagnostic Test Accuracy Studies (PRISMA-DTA) guidelines [55, 56] and the present review was registered on the PROSPERO database at the Centre of Reviews and Dissemination, University of York, UK, with the registration number CRD42022350086 (https://www.crd.york.ac.uk/PROSPERO/display_record.php?RecordID=350086).
Availability of data and materials
All data generated or analyzed during this study are included in this article.
Ankyrin repeat domain 18C, pseudogene
Achaete-scute family bHLH transcription factor 1
Atypical squamous cells of undetermined significance
Area under the curve
Cell adhesion molecule 1
Conformité Européene in vitro diagnostic
Cervical intraepithelial neoplasia
- DLX 1:
Distal-less homeobox 1
Erythrocyte membrane protein band 4.1 like 3
High-risk human papillomavirus
High-grade intraepithelial lesions
Invasive cervical carcinoma
Integrin subunit alpha 4
Junctional adhesion molecule 3
LIM homeobox 8
Mal, T cell differentiation protein
Negative predictive values
Paired box 1
Positive predictive values
Receiver operating characteristics
Rubicon-like autophagy enhancer
Relaxin family peptide receptor 3
Slit guidance ligand 2
- SOX 17:
SRY-box transcription factor 17
SRY-box transcription factor 1
Summary receiver operating characteristics
ST6 N-acetylgalactosaminide alpha-2,6-sialyltransferase 5
TAFA chemokine-life family member 4
Telomerase reverse transcriptase
Zinc finger and SCAN domain containing 1
Zinc finger protein 582
Zinc finger protein 671
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The authors thank all Cancer Biology & Epigenetics’ members who helped in data discussion.
The authors would like to acknowledge the Research Centre of Portuguese Oncology Institute of Porto (CI-IPOP-27 and CI-IPOP-130-2020-DNAmeCERVIX). SS is recipient of a fellowship from FCT—Fundação para a Ciência e Tecnologia— (SFRH/BD/143717/2019).
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Salta, S., Lobo, J., Magalhães, B. et al. DNA methylation as a triage marker for colposcopy referral in HPV-based cervical cancer screening: a systematic review and meta-analysis. Clin Epigenet 15, 125 (2023). https://doi.org/10.1186/s13148-023-01537-2
- Cervical cancer screening
- DNA methylation
- Colposcopy referral