Detection Of Precancerous Lesions Research Articles

A novel, noninvasive, multimodal screening test for the early detection of precancerous lesions and colorectal cancers using an artificial intelligence–based algorithm.

3627 Background: Colorectal cancer (CRC) ranks as the second leading cause of cancer-related mortality worldwide, and its incidence is increasing in younger populations. Detection of early-stage CRC and its precursor lesions, such as advanced adenomas (AA), is crucial for successful treatment and reduces CRC-related mortality. Although non-invasive methods for early detection are available and increase screening compliance, their performance with respect to detection of advanced adenomas and early-stage cancers is limited. Here, we describe a novel and non-invasive stool-based approach combining diagnostic biomarkers with an algorithm generated by machine learning/artificial intelligence (ML/AI) resulting in significantly improved diagnostic performance for the detection of not only CRC, but especially precancerous lesions like AA. Methods: Data were generated from a combined cohort of stool samples collected at 10 clinical sites in Europe (COLOFUTURE study) and 21 clinical sites in the US (eAArly DETECT study). The evaluable study cohort consists of 690 subjects, including 78 CRC, 146 AA, 147 with non-advanced adenoma (AD) and 319 normal colonoscopy negative control (NC) subjects (49% female, 51% male, average age 61.8 years). Results were compared with colonoscopy and pathology findings to determine sensitivity and specificity for detection of early-stage CRC and AA vs. AD and NC. Nucleic acids were extracted from stabilized stool samples using a silica bead-based extraction method. Expression of mRNA biomarkers was analyzed utilizing Real-Time PCR. Human hemoglobin was quantified using FIT. The Emerge Quantitative Evolution ML/AI platform was leveraged to develop classifiers capable of distinguishing CRC and AA from AD and NC. Results: Applying the combined approach of non-invasive diagnostic testing with an AI/ML generated algorithm, the sensitivity for detection of CRC overall was 92.3%. In addition, this method enabled AA detection with a sensitivity of 82.2%. Specificity turned out to be 90.1 % (AD+NC). Conclusions: This innovative, non-invasive, multimodal screening strategy based on self-collected stool samples which combines mRNA expression patterns and FIT analysis with an AI/ML-generated algorithm represents a substantial improvement in the effectiveness of non-invasive CRC screening. Such improvements in usability and performance leading to reliable detection of early-stage CRC and precursor lesions, such as advanced adenomas, are required for wide-spread availability and adaption of non-invasive screening tests to accepted clinically relevant usage and to prevent the development of CRC effectively.

Multi-scale window transformer for cervical cytopathology image recognition

Cervical cancer is a major global health issue, particularly in developing countries where access to healthcare is limited. Early detection of pre-cancerous lesions is crucial for successful treatment and reducing mortality rates. However, traditional screening and diagnostic processes require cytopathology doctors to manually interpret a huge number of cells, which is time-consuming, costly, and prone to human experiences. In this paper, we propose a Multi-scale Window Transformer (MWT) for cervical cytopathology image recognition. We design multi-scale window multi-head self-attention (MW-MSA) to simultaneously integrate cell features of different scales. Small window self-attention is used to extract local cell detail features, and large window self-attention aims to integrate features from smaller-scale window attention to achieve window-to-window information interaction. Our design enables long-range feature integration but avoids whole image self-attention (SA) in ViT or twice local window SA in Swin Transformer. We find convolutional feed-forward networks (CFFN) are more efficient than original MLP-based FFN for representing cytopathology images. Our overall model adopts a pyramid architecture. We establish two multi-center cervical cell classification datasets of two-category 192,123 images and four-category 174,138 images. Extensive experiments demonstrate that our MWT outperforms state-of-the-art general classification networks and specialized classifiers for cytopathology images in the internal and external test sets. The results on large-scale datasets prove the effectiveness and generalization of our proposed model. Our work provides a reliable cytopathology image recognition method and helps establish computer-aided screening for cervical cancer. Our code is available at https://github.com/nmyz669/MWT, and our web service tool can be accessed at https://huggingface.co/spaces/nmyz/MWTdemo.

Association between non-healing precancerous oral lesions and ulcers with tobacco smoking: A population-based study

BackgroundThis study aims to identify early detection of precancerous lesions amongst high-risk individuals (motor park workers). Though anecdotal evidence suggests they are high users of alcohol, marijuana, and cigarette smoking which are prominent risk factors for the occurrence of oral cancers the occurrence of precancerous lesions in this group has not been determined. MethodThis was a prospective cross-sectional study of a target population of motor park workers (40 years and above). Participants were selected from motor parks in Lagos. All participants had an examination of oral mucosa done for pre-cancerous or cancerous lesions. All suspected mucosa were stained with toluidine blue. All positively stained mucosa were repeated after 1 week for confirmation blue for suspicious cases. Positive cases were biopsied and histology was determined. ResultA total of 453 participants completed the survey. The mean age of participants was 39.4 years (SD: 12.5), 52.8 % were male, while 47.2 % were female. A majority of ever and current smokers did not have oral ulcers, and all the participants with oral ulcers did not indicate a history of smoking. a history of ever-smoking was significantly associated with higher odds of oral lesions in both bivariate (OR: 4.58; 95 % CI: 2.04,10.29; p:<0.001) and multivariate models (OR:2.76). ConclusionSmoking was significantly associated with oral pre-cancerous lesions in this study.

PAP-test: Possibilities and Limitations

Cervical cancer (CC) progresses slowly, and the cytological screening increases the likelihood of early detection of precancerous lesions. Cytology of the cervix is one of the primary methods of effective CC diagnosis, which, thanks to early detection and timely treatment, leads to a stable decrease in morbidity and mortality from invasive CC. The results of many studies have shown that the specificity of the conventional Pap smear test is approximately 80–100%, its sensitivity ranges from 30% to 80%, and the rate of inadequacy of this method is from 5% to 25%. With traditional smear preparation, only a small percentage of collected cells end up on the slide, while abnormal cells may be discarded and not analyzed. When viewing the slide, cells that have dried and clumped together may interfere with the visualization of atypical cells. To overcome these limitations, in 1996, as an alternative to the traditional Pap test, liquid cytology was presented – the technology of preparing slides on which the cells are placed in a single layer. This technology outperformed the conventional Pap test with improved fixation, reduced obscuring factors, and standardized cell transfer. In liquid cytology samples are collected by fully immersing the cytobrush in a vial containing a preservative liquid, whereby the cells are preserved and fixed simultaneously, unlike conventional smears where the sample is applied to a glass slide and fixed separately. Today, two main methods of preparation based on liquid cytology are known: ThinPrep and SurePath. The results of cytology are described according to the Bethesda system. The Bethesda classification is widely accepted because it corresponds to the clinical presentation, reproduces the nature of the lesions, and is therefore treatmentoriented with a desirable follow-up procedure. The indisputable advantage of the Pap test by liquid cytology is the ability to perform both cytological and molecular studies, in particular HPV, in one sample. This capability facilitated the implementation of a two-step strategy when HPV testing is used as a triage test for ASC-US or low-grade squamous intraepithelial lesion cytology, or when cytology is used to triage HPV-positive women.

Advancements in Endoscopic Resection for Colitis-Associated Colorectal Neoplasia in Inflammatory Bowel Disease: Turning Visible into Resectable.

Patients suffering from inflammatory bowel disease (IBD) face a two to three-fold higher risk of developing colorectal cancer (CRC) compared to the general population. In recent years, significant progress has been made in comprehending the natural history of IBD-associated CRC (IBD-CRC) and refining its treatment strategies. The decreased incidence of IBD-CRC can be attributed to improved therapeutic management of inflammation, advancements in endoscopy, and early detection of precancerous lesions via surveillance programs. Advanced imaging technologies have made previously undetectable dysplasia visible in most cases, allowing for a much more precise and detailed examination of the mucosa. Additionally, new tools have facilitated the endoscopic resection (ER) of visible lesions in IBD. Particularly, the key to effectively manage colitis-associated colorectal neoplasia (CAN) is to first identify it and subsequently guarantee a complete ER in order to avoid surgery and opt for continuing surveillance. Advanced ER techniques for CAN include endoscopic mucosal resection (EMR), endoscopic submucosal dissection (ESD), and hybrid ESD-EMR (h-ESD). This narrative review aims to consolidate the current literature on IBD-CRC, providing an overview of advanced techniques for ER of CAN in IBD, with a particular emphasis on the impact of ESD on the long-term outcomes of IBD patients.

Prevalence and predictors of cervical cancer screening among HIV-positive women in rural western Uganda: insights from the health-belief model

BackgroundWomen living with HIV are at increased risk of developing cervical cancer (CC). Screening for cancer is an important preventive strategy for the early detection of precancerous lesions and its management. There has been inadequate evidence on cervical cancer screening (CCS) practices among HIV-positive women in rural western Uganda. This study aimed to assess the prevalence and predictors of CCS among HIV-positive women, as well as knowledge and practices regarding cervical cancer screening.MethodsA cross-sectional, analytical study was conducted among HIV-positive women attending HIV care facilities located in rural settings of western Uganda. A validated and interview-based data collection form was used to capture statistics regarding demographics, HIV care, obstetric profile, health belief constructs, and knowledge and history of CCS from the participants. Bivariate and multivariate logistic regression analyses were used to correlate women’s characteristics and health beliefs toward CCS practices.ResultsThe prevalence of CCS among HIV-positive women was found to be 39.1% (95%CI: 14.0–71.7). A multivariate logistic regression analysis showed that post-secondary education attainment (AOR = 3.21; 95%CI = 2.12–7.28), four years or more lapsing after being diagnosed as HIV-positive (AOR = 2.87; 95%CI = 1.34–6.13), having more than one child (AOR = 1.87; 95%CI = 1.04–3.35), antenatal care attendance (AOR = 1.74; 95%CI = 1.02–3.43), post-natal care attendance (AOR = 3.75; 95%CI = 1.68–5.89), and having good knowledge regarding CC (AOR = 1.26; 95%CI = 1.98–3.02) were positively associated with adherence to CCS among HIV-positive women in western Uganda. Health Belief Model (HBM) constructs like the perceived risk of developing CC (AOR = 1.82; 95%CI = 1.16–2.01), worries about developing CC (AOR = 5.01; 95%CI = 4.26–8.32), believing that CC leads to death (AOR = 2.56; 95%CI = 1.64–3.56), that screening assists in early identification (AOR = 2.12; 95%CI = 1.84–3.74) and treatment (AOR = 4.63; 95%CI = 2.78–6.43) of precancerous lesions, reducing the risk of mortality (AOR = 1.84; 95%CI = 1.12–2.75), and the reassurance provided by negative test results (AOR = 2.08; 95%CI = 1.33–4.22) were positively associated with adhering to CCS. A female doctor performing the screening (AOR = 2.02; 95%CI = 1.57–3.98) as well as offering a free screening service (AOR = 3.23; 95%CI = 1.99–4.38) were significantly associated with CCS. Meanwhile, screening being painful (AOR = 0.28; 95%CI = 0.12–0.45), expensive (AOR = 0.36; 95%CI = 0.24–0.53), time-consuming (AOR = 0.30; 95%CI = 0.19–0.41), embarrassing (AOR = 0.02; 95%CI = 0.01–0.06), and the fear of positive results (AOR = 0.04; 95%CI = 0.02–0.10) were found to have a significant negative association with adhering to CCS.ConclusionsOnly one-third of HIV-positive women had undergone CCS. Variables including secondary education attainment, four years or more lapsing after being diagnosed as HIV-positive, having more than one child, antenatal care attendance, post-natal care attendance, and knowledge about CC were positively associated with CCS adherence. Educational programs should be geared towards the risk of CC, severity of cases, benefits of screening, and reducing barriers associated with screening, which can significantly improve cervical CCS among HIV-positive women. The study proposes the incorporation of free screening services and the inclusion of trained female staff in CC prevention policies to improve CCS.

Evaluating the economic screening of cervical cancer using IVA, HPV DNA, and histology methods: Systematic review

Background: Cervical cancer is a common malignancy causing cancer-related deaths worldwide. Evidence suggests that adequate screening can reduce cervical cancer-related deaths. Screening for cervical cancer can be done using Visual Inspection of Acetic Acid (VIA), HPV DNA and cytology. The economic burden of cancer patients is substantial ranging from US$8,066 to 22,888 per patient. Health cost effectiveness was comparative in the analysis of costs and consequences for the three screening methods. VIA is the most cost-effective primary screening test for cervical cancer. Purpose: To review the research results of a full economic evaluation to encourage the specific cervical cancer screening methods used to enhance the detection of precancerous lesions in women's cervix. Method: This systematic review used the PRISMA ScR framework with a literature search using 3 databases, namely Pubmed, Wiley, and Google Scholar, with years of publication from 2009 – 2023. The data that has been obtained is carried out by critical appraisal using the Consolidated Health Economic Evaluation Reporting Standards (CHEERS). Results: Based on the search for 3,973 selected articles, 7 match the inclusion criteria. This systematic review discovered three major themes: the utility value of health status, cost and analysis. Conclusion: The most cost-effective cervical cancer screening is by VIA. HPV DNA and pap smear based cytology techniques have been reported to show high sensitivity and specificity respectively including being expensive and resource intensive. In contrast the VIA technique has moderate sensitivity and specificity but is less expensive Various developed countries have used Pap or HPV DNA cytology tests as the main screening method, which can lead to a 50-70% reduction in cervical cancer incidence, while in developing countries using VIA tests as a cervical cancer screening method.

Evaluation of Visual Inspection of Cervix with Acetic Acid in Detecting Precancerous Lesions

Background: Cervical cancer is a major public health problem in Bangladesh without widespread organized cervical screening programs. The acetic acid visual inspection of the cervix (VIA) is an efficient, low-cost screening test that can be paired with easy treatment procedures for early cervical lesions provided by skilled health workers. To evaluate the effect of any prevention program on cervical cancer incidence and mortality rates, women aged 25 to 50 must be adequately covered. VIA is a cost-saving method of screening, according to mathematical modeling of the expenses of various screening procedures in Bangladesh. Methods: Total 100 eligible woman who randomly came to the VIA centre of BSMMU were examined by VIA detection of well defined, opaque, acetowhite lesions close to the squamocolumner junction or in transitional zone or dense acetowhitening of ulcero proliferative growth on the cervix constitute a positive VIA Those who had abnormal results in screening test and those who had clinically suspicions lesion were sent for colposcopic evaluation and directed biopsy were taken from colposcopically suspected area. The final diagnosis was based on histology. Results: Healthy cervix was in 11 cases (11%) suspected inflammation was 4 cases (4%), CIN-I was 58 cases (58%), CIN-II was in 14 cases (14%), CNN-III was in 10 cases (10%), and invasive carcinoma was in 3 case (3%). Out of 100 patients biopsied, cervical intraepithelial neoplasia found among 81% cases of which CIN was in 52.5%, CIN II was in 17% and CIN III was in 8.5%. Invasive carcinoma found in 3% and inflammation was in 4% cases. Conclusion: VIA was as effective as colposcopy at detecting various grades of intraepithelial cervix lesions. Here, VIA was suitable for the diagnosis, follow-up care, and epidemiological research of cervical cancer, as well as for the detection of precancerous lesions in low resource settings.

Public Health Approach in the Elimination and Control of Cervical Cancer: A Review.

Public health experts worldwide have emphasized cervical cancer since it is a substantial global health burden primarily affecting women. This article thoroughly reviews the public health approach to eradicating and managing cervical cancer. The public health community seeks to lower the prevalence, morbidity, and mortality linked to this preventable disease by integrating primary prevention by means of vaccination against the human papillomavirus (HPV), secondary prevention using screening and early identification, and tertiary prevention through improved therapy and supportive care. In order to accomplish broad vaccination coverage and ultimately effectively preventcervical cancer, it remains crucial to address obstacles to vaccine accessibility, reluctance, and fair distribution. Early identification and subsequent treatments depend greatly on cervical cancer screening programs. This study explores several screening methods, such as Papanicolaou (Pap) tests based on cytology and cutting-edge technologies like molecular assays and HPV detection. The detection of precancerous lesions and early-stage malignancies, permitting prompt treatment, has shown significant promise when integrating these technologies into coordinated population-based screening programs. The study also underlines the significance of addressing cervical cancer burden inequities, particularly in resource-constrained areas where access to preventative and curative care is constrained. Innovative and affordable methods for addressing marginalized groups are studied, including community-based outreach programs, mobile health technology, and local healthcare practitioners and community leaders in awareness campaigns. The research also examines improvements in cervical cancer treatment procedures, such as surgery, radiation, chemotherapy, and immunotherapy. It improves therapeutic efficacy and patient survival rates by incorporating various modalities into a multidisciplinary strategy. Highlighted palliative care and psychological support are crucial for patients who have advanced cervical carcinoma.

The cytological pattern of cervical papanicolaou smear in a tertiary hospital of India

Background: Cervical cancer continues to be listed among the top gynecologic cancers worldwide. According to current data, it is ranked fourteenth among all cancers and fourth-ranked cancer among women worldwide. In India alone 1,30,000 new cases occur with the death toll of 70,000 per year. A “PAP’ test should be performed during the second half of the menstrual cycle (Day 14). The patient is placed in lithotomy position and the cervix is visualized by means of a speculum. The smaller end of the Ayre’s spatula is introduced through the external os and the squamocolumnar junction is scraped by rotating the spatula to 360°. Aims and Objectives: The objective of the study is to evaluate the use of the Pap smear screening method for detection of precancerous lesions. Cervical cancer accounts for 15% of all cancers in females. If treated or detected earlier, cervical cancer can be prevented. Materials and Methods: This study was done on 1000 patients during reproductive and later age groups (postmenopausal), attending Obstetric and Gynaecological Outpatient Department of Panna Dhai Hospital associated with RNTMC, Udaipur during the period of November 2012–April 2014 with history of white discharge per vagina, bleeding per vagina, pain in lower abdomen and post coital bleeding. Results: Most of the smears (90.1%) were NILM and 9.9% of smears showed cytological abnormality. Majority 834 (83.4%) of smears were inflammatory, Bacterial vaginosis was seen in 119 cases (11.9%), Candidiasis in 78 cases (7.8%), Trichomoniasis in 35 cases (3.5%), Atrophic vaginitis in 4 cases (0.4%) and Radiation changes in 4 cases (0.4%). There were 99 samples reported as having epithelial cell abnormality. Out of which 75 were LSIL, 14 were high grade squamous intraepithelial, 5 were atypical squamous cells (ASC)-US, 1 was ASC-H and 4 were squamous cell carcinoma. Conclusion: Due to high sensitivity, specificity and accuracy found in this study Pap test is proved to be highly useful to detect precancerous and cancerous lesions of cervix. From the above facts, it can be concluded that early diagnosis and prompt specific treatment of preinvasive or early stages of the disease (mainly in high risk women), reduces the prevalence of invasive carcinoma of uterine cervix.

EE278 A Systematic Review of Economic Evaluations of Cervical Cancer Screening Methods

Cervical cancer screening is a public health priority with the potential to improve pre-cancerous lesion detection in high-risk females for disease prevention. The objective of the systematic review was to identify primary and model-based economic evaluations of cervical cancer screening methods, and to provide a contextual summary of valuation outcomes associated with three types of cervical cancer screening tests: Visual Inspection with Acetic Acid, Human Papilloma Virus Deoxyribonucleic Acid, and Papanicolaou Smear.

Improving polyp detection at colonoscopy: Non-technological techniques

Colonoscopy and polypectomy remain the gold standard investigation for the detection and prevention of colorectal cancer. Halting the progression of colonic adenoma through adequate detection of pre-cancerous lesions interrupts the progression to carcinoma. The adenoma detection rate is a key performance indicator. Increasing adenoma detection rates are associated with reducing rates of interval colorectal cancer. Endoscopists with high baseline adenoma detection rate have a meticulous technique during colonoscopy withdrawal that improves their adenoma detection. This minireview article summarizes the evidence on the following simple operator techniques and their effects on the adenoma detection rate; minimum withdrawal times, dynamic patient position change and proximal colon retroflexion.

Diffuse Reflectance Spectroscopy of the Oral Mucosa: In Vivo Experimental Validation of the Precancerous Lesions Early Detection Possibility.

This article is devoted to the experimental validation of the possibility of early detection of precancerous lesions in the oral mucosa in vivo using diffuse reflectance spectroscopy in the wavelength range from 360 to 1000 nm. During the study, a sample of 119 patients with precancerous lesions has been collected and analyzed. As a result of the analysis, the most informative wavelength ranges were determined, in which the maximum differences in the backscattering spectra of lesions and intact tissues were observed, methods for automatic classification of backscattering spectra of the oral mucosa were studied, sensitivity and specificity values, achievable using diffuse reflectance spectroscopy for detecting hyperkeratosis on the tongue ventrolateral mucosa surface and buccal mucosa, were evaluated. As a result of preliminary experimental studies in vivo, the possibility of automatic detection of precancerous lesions of the oral mucosa surface using diffuse reflectance spectroscopy in the wavelength range from 500 to 900 nm with an accuracy of at least 75 percent has been shown.

Inflammation-Driven Colorectal Cancer Associated with Colitis: From Pathogenesis to Changing Therapy

Patients affected by inflammatory bowel disease (IBD) have a two-fold higher risk of developing colorectal cancer (CRC) than the general population. IBD-related CRC follows a different genetic and molecular pathogenic pathway than sporadic CRC and can be considered a complication of chronic intestinal inflammation. Since inflammation is recognised as an independent risk factor for neoplastic progression, clinicians strive to modulate and control disease, often using potent therapy agents to achieve mucosal healing and decrease the risk of colorectal cancer in IBD patients. Improved therapeutic control of inflammation, combined with endoscopic advances and early detection of pre-cancerous lesions through surveillance programs, explains the lower incidence rate of IBD-related CRC. In addition, current research is increasingly focused on translating emerging and advanced knowledge in microbiome and metagenomics into personalised, early, and non-invasive CRC screening tools that guide organ-sparing therapy in IBD patients. This review aims to summarise the existing literature on IBD-associated CRC, focusing on new insights into the alteration of the intestinal barrier and the interactions with the gut microbiome as the initial promoter. In addition, the role of OMIC techniques for precision medicine and the impact of the available IBD therapeutic armamentarium on the evolution to CRC will be discussed.

Papanicolaou Smear screening in Aligarh: A Review of the Cases

ABSTRACT: Cervical cancer is the second most common cancer after breast cancer. The risk factors associated with this dreaded yet preventable cancer is age at sexual debut, parity, multiple sexual partners, use of contraceptives and smoking etc. Fortunately, the cervical cancer are preventable because of the early detection of precancerous lesions. This is made possible by the screening procedures routinely in practice such as Pap smear, visual inspection and HPV. Methodology: The study was conducted to evaluate cervical cytological abnormalities, through pap smear reported as inflammatory lesions, precancerous (CIN1/ CIN2/CIN3) and carcinoma in situ, in women who underwent pap smear screening at the hospital. Discussion and Conclusion: This was a prospective study of pap smears received in the cytopathology laboratory from January 2019 to July 2019. A total of 202 Papanicolaou smears were sent to the cytology laboratory during the 6month time period. There were 112 (55.4%) abnormal pap smears (epithelial cell abnormalities, infections and inflammatory smears). 14 (6.9%) smears were inadequate or unsatisfactory for evaluation. 89 (44%) cases had inflammatory changes whereas epithelial abnormality was seen in 23 (11%). These findings corroborate with the fact that Papanicolaou (Pap) test is an important screening tool and is a simple technique to detect precancerous cervical lesions.

Lynch syndrome cancer vaccines: A roadmap for the development of precision immunoprevention strategies.

Hereditary cancer syndromes (HCS) account for 5~10% of all cancer diagnosis. Lynch syndrome (LS) is one of the most common HCS, caused by germline mutations in the DNA mismatch repair (MMR) genes. Even with prospective cancer surveillance, LS is associated with up to 50% lifetime risk of colorectal, endometrial, and other cancers. While significant progress has been made in the timely identification of germline pathogenic variant carriers and monitoring and early detection of precancerous lesions, cancer-risk reduction strategies are still centered around endoscopic or surgical removal of neoplastic lesions and susceptible organs. Safe and effective cancer prevention strategies are critically needed to improve the life quality and longevity of LS and other HCS carriers. The era of precision oncology driven by recent technological advances in tumor molecular profiling and a better understanding of genetic risk factors has transformed cancer prevention approaches for at-risk individuals, including LS carriers. MMR deficiency leads to the accumulation of insertion and deletion mutations in microsatellites (MS), which are particularly prone to DNA polymerase slippage during DNA replication. Mutations in coding MS give rise to frameshift peptides (FSP) that are recognized by the immune system as neoantigens. Due to clonal evolution, LS tumors share a set of recurrent and predictable FSP neoantigens in the same and in different LS patients. Cancer vaccines composed of commonly recurring FSP neoantigens selected through prediction algorithms have been clinically evaluated in LS carriers and proven safe and immunogenic. Preclinically analogous FSP vaccines have been shown to elicit FSP-directed immune responses and exert tumor-preventive efficacy in murine models of LS. While the immunopreventive efficacy of "off-the-shelf" vaccines consisting of commonly recurring FSP antigens is currently investigated in LS clinical trials, the feasibility and utility of personalized FSP vaccines with individual HLA-restricted epitopes are being explored for more precise targeting. Here, we discuss recent advances in precision cancer immunoprevention approaches, emerging enabling technologies, research gaps, and implementation barriers toward clinical translation of risk-tailored prevention strategies for LS carriers. We will also discuss the feasibility and practicality of next-generation cancer vaccines that are based on personalized immunogenic epitopes for precision cancer immunoprevention.

A CAD system for automatic dysplasia grading on H&E cervical whole-slide images

Cervical cancer is the fourth most common female cancer worldwide and the fourth leading cause of cancer-related death in women. Nonetheless, it is also among the most successfully preventable and treatable types of cancer, provided it is early identified and properly managed. As such, the detection of pre-cancerous lesions is crucial. These lesions are detected in the squamous epithelium of the uterine cervix and are graded as low- or high-grade intraepithelial squamous lesions, known as LSIL and HSIL, respectively. Due to their complex nature, this classification can become very subjective. Therefore, the development of machine learning models, particularly directly on whole-slide images (WSI), can assist pathologists in this task. In this work, we propose a weakly-supervised methodology for grading cervical dysplasia, using different levels of training supervision, in an effort to gather a bigger dataset without the need of having all samples fully annotated. The framework comprises an epithelium segmentation step followed by a dysplasia classifier (non-neoplastic, LSIL, HSIL), making the slide assessment completely automatic, without the need for manual identification of epithelial areas. The proposed classification approach achieved a balanced accuracy of 71.07% and sensitivity of 72.18%, at the slide-level testing on 600 independent samples, which are publicly available upon reasonable request.

The role of nurses in the prevention of cervical cancer: Cervical screening, an unkept promise by the majority of women in Nigeria

ABSTRACT Cervical cancer remains a major public health problem accounting for continuous female death in developing countries. Cervical cancer is the second most common cancer in women globally with an estimated number of 500,000 new cases of cervical cancer and 273,000 mortalities annually. Cervical screening is the best cancer screening test in the history of medicine and most cost-effective of all medical screening tests. The study review aimed to highlight methods of cervical cancer prevention, identify the uptake of cervical screening among women, and explain the role of nurses in uptake of cervical screening. Cervical cancer is preventable and easily treatable if it is detected at early stages, but poor information on prevention and access to screening and treatment contributes to 90% of deaths. In the developing countries such as Nigeria, a large proportion of cervical cancers are diagnosed in advanced stages, with poor rates of survival. The three main methods for preventing cervical cancer are through primary prevention (human papillomavirus vaccination and health education), secondary prevention (cervical screening, early detection of precancerous lesions, and treatment), and tertiary prevention (measures to slow the progression or recurrence, surgical removal, radiotherapy, and chemotherapy). Nurses can help improve the acceptability of this neglected promise by focusing on health education on cervical screening and vaccination in prenatal clinics and infant welfare clinics where there are more women. Inclusion of cyberspace could also serve as a successful and popular platform for this health teaching. All nurses/midwives must preach and fervently work toward the WHO 90–70–90 plan for eradicating cervical cancer.

Effect of add-on devices with projections on screening colonoscopy: a systematic review and meta-analysis.

Add-on devices with projections, e.g., Endocuff, Endocuff Vision, EndoRings, and Wingcap, placed on the distal tip of the colonoscope promise to improve the detection of precancerous lesions. We performed a meta-analysis to evaluate the performance of these devices exclusively among individuals undergoing colonoscopy for screening purpose. A computerized literature search was performed across MEDLINE and Cochrane Library databases for randomized controlled trials that compared standard colonoscopy (SC) to procedures using add-on devices. The primary outcome was adenoma detection rate (ADR), while secondary outcomes included polyp detection rate (PDR), advanced ADR (AADR), and sessile serrated lesion detection rate (SSLDR). The effect size on study outcomes was calculated using a random-effects model and presented as the risk ratio (RR) and 95% confidence interval (CI). Seven studies enrolling a total of 5785 patients were included. The use of add-on-devices with projections was associated with a higher ADR compared to SC: 45.9% vs. 41.1%; RR 1.18, 95%CI 1.02-1.37; P=0.03; I2=79%. Although PDR was higher in screening colonoscopies assisted by add-on devices as compared to SC, the difference failed to reach significance: 55.1% vs. 50.8%; RR 1.10, 95%CI 0.96-1.26; P=0.17; I2=75%. No difference was found between procedures assisted by add-on devices with projections and SC colonoscopies in terms of AADR (18.5% vs. 17.6%; RR 1.00, 95%CI 0.79-1.27; P=0.98; I2=56%) or SSLDR (6.8% vs. 5.8%; RR 1.17, 95%CI 0.95-1.44; P=0.15; I2=0%). Colonoscopy assisted by add-on devices with projections achieves a better ADR compared to SC among individuals undergoing screening for bowel cancer.

Sociodemographic factors predicting cervical cancer screening in a peri-urban community in Ghana

Background Cervical cancer is one of the few preventable cancers and screening is critical to the early detection of pre-cancerous lesions and initiation of treatment. This study’s aim was to determine the sociodemographic predictors of cervical cancer screening uptake in a peri-urban community in Ghana. Methods A total of 392 randomly selected sexually active women aged 10–74 years participated in this cross-sectional study. Data were collected using structured interview schedules. Binary logistic regression analysis was performed to determine the predictors of cervical cancer screening (significance set at P&lt;0.05). Results Only three of the 392 participants had ever had a Pap smear test (0.8%). Women in monogamous relationships were more likely to have had a Pap smear test (P=0.001). There was a significant association between ethnicity (P=0.019), monthly family income (P=0.015) and religion (P=0.001) and having had a Pap smear test. Conclusions It is critical that interventions to increase the uptake of cervical cancer screening aim to reduce sociodemographic inequities, in order to promote women’s health.