Reframing endoscopic screening in upper gastrointestinal cancers: From early detection to precision primary prevention

Abstract

Upper gastrointestinal (UGI) cancers remain a major global health burden, particularly in high-incidence regions. Traditionally, endoscopic screening has been positioned as a secondary prevention strategy aimed at detecting premalignant lesions and early-stage cancers. However, emerging evidence suggests that the role of endoscopic screening may extend beyond early diagnosis and into the realm of primary cancer prevention. Recent prospective data suggest that participation in UGI endoscopic screening programs may be associated with reductions in modifiable behavioral risk factors, including cigarette smoking, alcohol consumption, and unhealthy dietary habits. These findings challenge the conventional paradigm that screening solely identifies disease and instead support the concept that screening encounters may serve as critical behavioral intervention windows (i.e., brief, clinician-delivered risk communication and counseling opportunities during and after screening). From an oncologic perspective, this raises important questions regarding how screening programs can be optimized to function as structured risk-modification platforms. This review examines the evolving concept of endoscopy as a catalyst for primary prevention, integrating behavioral science, risk stratification models, and population-based cancer control strategies. We discuss how screening-triggered health education, individualized risk communication, and integration with molecular and epidemiologic risk profiling could transform UGI cancer prevention frameworks. Furthermore, we explore the implications of redefining screening programs as multidimensional interventions rather than purely diagnostic tools. As precision oncology advances, cancer prevention must evolve accordingly. Reframing UGI endoscopic screening from a detection-centered approach to a precision prevention platform may conceptually enhance long-term cancer control, reduce population-level risk exposure, and improve cost-effectiveness in high-risk regions. Future implementation research is warranted to validate sustainable models that integrate behavioral modification into structured screening pathways.

Key Words: Upper gastrointestinal cancer; Endoscopic screening; Primary prevention; Precision prevention; Behavioral modification; Risk stratification; Cancer control

Core Tip: Endoscopic screening for upper gastrointestinal cancers has traditionally been regarded as a secondary prevention tool focused on early detection. Emerging evidence suggests that screening participation may facilitate behavioral risk modification and enhanced risk awareness, suggesting a potential paradigm shift toward precision primary prevention. By integrating behavioral intervention, risk stratification, and digital follow-up into structured screening pathways, endoscopic programs can evolve into multidimensional prevention platforms that reduce long-term cancer risk and improve population-level cancer control.

INTRODUCTION

Upper gastrointestinal (UGI) cancers, particularly esophageal and gastric cancers, remain a major contributor to global cancer burden, especially in high-incidence regions such as East Asia[1,2]. Despite advances in therapeutic strategies, the prognosis of advanced UGI cancers remains poor, underscoring the critical importance of prevention and early intervention[3]. Endoscopic screening has been widely implemented as a core strategy for secondary prevention, aiming to detect premalignant lesions and early-stage malignancies to reduce mortality and improve survival outcomes[4-6].

However, the conventional framework that strictly categorizes screening as secondary prevention and lifestyle modification as primary prevention may be overly simplistic[7]. Recent population-based and prospective evidence suggests that participation in endoscopic screening programs is associated not only with earlier cancer detection but also with enhanced health awareness, improved risk perception, and potential behavioral modification, although direct quantitative evidence on the magnitude and sustainability of such behavioral changes remains limited, and most available data are derived from observational and population-based studies rather than randomized behavioral intervention trials[8-10]. These observations challenge the traditional detection-centered paradigm and introduce the concept of screening as a potential behavioral intervention window[11-13].

From an oncologic prevention perspective, this shift is particularly meaningful. UGI carcinogenesis is strongly influenced by modifiable risk factors, including tobacco use, alcohol consumption, dietary patterns, and Helicobacter pylori infection. Therefore, screening encounters represent a unique opportunity to integrate risk communication, personalized counseling, and precision prevention strategies[14,15]. As precision oncology advances, prevention frameworks must evolve accordingly. This review aims to conceptually reframe UGI endoscopic screening from a secondary detection tool to a precision primary prevention platform by integrating behavioral science, risk stratification, and multidimensional cancer control strategies (Figure 1 and Table 1).

Figure 1 Conceptual framework of reframing endoscopic screening in upper gastrointestinal cancers from early detection to precision primary prevention. UGI: Upper gastrointestinal; AI: Artificial intelligence.

Table 1 Transformation of endoscopic screening from early detection to precision primary prevention in upper gastrointestinal cancers.

Dimension	Traditional detection-centered screening	Precision primary prevention-oriented screening
Core objective	Early detection of premalignant lesions and early-stage cancers	Reduction of long-term cancer risk through integrated prevention
Prevention level	Secondary prevention	Integrated primary and secondary prevention
Conceptual framework	Diagnostic and surveillance tool	Multidimensional prevention and intervention platform
Target focus	Lesion identification and staging	Risk factor modification and individualized risk management
Role of patients	Passive recipients of diagnostic procedures	Active participants in behavioral change and risk reduction
Behavioral intervention	Rarely incorporated into screening workflow	Structured lifestyle counseling embedded in screening encounters
Risk perception	Limited to diagnostic results	Enhanced through visualization, communication, and personalized feedback
Risk stratification	Mainly age and epidemiology-based	Multidimensional (epidemiology, lifestyle, biomarker-informed risk stratification, and digital profiling)
Clinical pathway	Screening-diagnosis-treatment	Screening-risk assessment-behavioral intervention-long-term prevention
Health education	Optional or minimal	Structured and standardized component of screening programs
Follow-up strategy	Periodic surveillance only	Continuous digital follow-up and behavior monitoring
Technological integration	Conventional endoscopy	AI-assisted endoscopy, digital health tools, and precision risk models
Evaluation metrics	Detection rate and stage distribution	Behavioral modification, risk reduction, cost-effectiveness, and population health outcomes
Population impact	Mortality reduction through early diagnosis	Comprehensive cancer control through prevention and early intervention
Oncologic significance	Improves survival after disease onset	Potentially reduces incidence and carcinogenic exposure

AI: Artificial intelligence.

FROM DETECTION-CENTERED SCREENING TO A BROADER PREVENTION FRAMEWORK IN UGI CANCERS

Endoscopic screening has traditionally been conceptualized as a core strategy of secondary prevention in UGI cancers, primarily aiming to detect precancerous lesions and early-stage malignancies to reduce mortality and improve prognosis[4,5,16]. Large-scale screening programs, particularly in high-incidence regions, have demonstrated significant clinical value in improving early diagnosis rates and long-term survival, supporting the epidemiological and clinical rationale for organized endoscopic surveillance[8,17,18].

Current screening strategies are largely grounded in risk stratification based on age, geographic incidence, and known carcinogenic exposures, with modeling studies indicating that risk-adapted screening improves cost-effectiveness and healthcare efficiency, and may provide a useful economic benchmark for evaluating precision prevention-oriented screening models that integrate behavioral intervention and risk communication[19-21]. However, despite these advantages, real-world implementation faces persistent barriers, including low participation willingness, fear of invasive procedures, and disparities in healthcare access, all of which limit the population-level impact of screening programs[22,23].

More importantly, the conventional paradigm remains heavily detection-centered and often overlooks upstream carcinogenic determinants such as smoking, alcohol consumption, and unhealthy dietary patterns[24]. This diagnostic focus may restrict the preventive potential of screening and may limit the fully leverage of the screening encounter as a moment for behavioral and risk-based intervention, thereby leaving its long-term risk modification capacity underutilized[25].

ENDOSCOPIC SCREENING AS A BEHAVIORAL INTERVENTION WINDOW: EVIDENCE SUPPORTING PRIMARY PREVENTION

Emerging evidence suggests that endoscopic screening may exert preventive effects beyond early detection by influencing health awareness and behavioral decision-making, although current empirical evidence is predominantly observational and remains limited in quantifying long-term behavioral sustainability, with a particular lack of standardized data on specific behavioral outcomes such as smoking cessation, alcohol reduction, or dietary improvement[26]. Recent screening and surveillance research indicates that participation in gastrointestinal screening programs is associated with improved health consciousness and proactive lifestyle changes, supporting the concept that screening encounters function as behavioral catalysts[9,27].

From a behavioral science perspective, screening may represent a “teachable moment” during which individuals exhibit heightened risk perception and receptivity to preventive guidance, operationally occurring during peri-endoscopic encounters when clinicians or endoscopy teams provide brief risk communication, lifestyle counseling, and personalized feedback[28]. The visualization of mucosal abnormalities and personalized medical feedback during endoscopy may enhance perceived susceptibility to cancer, thereby motivating reductions in modifiable risk factors such as tobacco use, alcohol intake, and unhealthy diet. This intervention window may extend from the immediate peri-screening consultation to short-term follow-up interactions, including digital reminders or post-screening health education[29-31]. This mechanism is particularly relevant in UGI carcinogenesis, where lifestyle and environmental exposures play a dominant etiological role[32,33].

Furthermore, population-based screening studies have demonstrated that sustained participation in organized screening programs is associated with long-term improvements in health behaviors, although the magnitude and durability of these changes may vary according to health literacy, cultural context, and baseline risk perception, and reductions in cancer mortality, although the magnitude of behavior change is inconsistently reported and rarely quantified using standardized metrics across studies, suggesting that the benefits of screening extend into the domain of primary prevention[4,8,34]. These findings challenge the traditional dichotomy between primary and secondary prevention and support the reframing of screening as an integrated preventive intervention platform[35]. In practice, this “teachable moment” should be implemented as a brief, structured, and standardized counseling component embedded within routine screening workflows rather than a separate intensive intervention[36-38]. Nevertheless, high-quality longitudinal and randomized studies are still needed to directly verify whether screening-triggered behavioral changes are sustained and causally related to long-term cancer risk reduction[39,40]. In addition, future studies should incorporate quantifiable behavioral endpoints (e.g., smoking cessation rate, alcohol intake reduction, and dietary modification scores) to strengthen the evidence base for screening-associated behavioral change[41-43].

PRECISION PRIMARY PREVENTION: INTEGRATING RISK STRATIFICATION, BIOMARKERS, AND PERSONALIZED INTERVENTION

With the advancement of precision oncology, cancer prevention strategies are increasingly shifting toward individualized risk assessment and targeted intervention[44,45]. Molecular biomarkers, including circulating microRNAs and other early detection indicators, offer promising tools for refining risk prediction and enabling personalized preventive strategies within screening frameworks, potentially serving as pre-screening risk stratification tools, adjunct markers during endoscopic evaluation, and post-screening indicators for surveillance in high-risk populations[46,47]. However, the clinical integration of biomarkers into routine screening workflows remains at an exploratory stage and requires further validation in large-scale prospective studies[48,49].

In parallel, comprehensive risk models integrating epidemiological characteristics, genetic susceptibility, lifestyle factors, and biomarker profiles provide a multidimensional understanding of UGI cancer risk[50]. Such models allow clinicians to identify high-risk individuals more accurately and tailor screening intervals, counseling intensity, and preventive interventions accordingly[19].

Risk-stratified screening pathways may further enhance preventive efficiency by combining diagnostic procedures, biomarker-informed risk assessment, with individualized health education and behavioral counseling[51]. High-risk populations may benefit from intensified surveillance and structured lifestyle intervention, whereas lower-risk groups may require less frequent screening but stronger preventive communication[52]. This precision-oriented approach may improve clinical outcomes and optimize healthcare resource allocation in large-scale screening systems, thereby enhancing long-term cost-effectiveness by reducing avoidable carcinogenic exposures and downstream treatment burden[53].

Digital health technologies also play an increasingly important role in precision prevention. Screening registries, telehealth platforms, and personalized follow-up systems can facilitate continuous risk communication, behavioral monitoring, and long-term adherence to preventive recommendations, thereby strengthening the sustained impact of screening programs[54].

TRANSFORMING SCREENING PATHWAYS INTO MULTIDIMENSIONAL CANCER PREVENTION PLATFORMS

To fully realize the preventive potential of endoscopic screening, it is necessary to redesign screening pathways as multidimensional intervention platforms rather than isolated diagnostic procedures[55]. Embedding structured health education modules within the screening process can significantly enhance patient awareness and promote risk-reducing behaviors, thereby extending the preventive scope of screening[9,56].

Importantly, the integration of brief behavioral intervention and risk communication into routine endoscopic workflows should be designed as standardized and feasible components. For example, peri-screening risk communication, short structured counseling delivered by endoscopy teams, and digital follow-up platforms may represent practical approaches that align with existing clinical time constraints and heterogeneous patient characteristics. Such workflow-embedded models may enhance translational feasibility while minimizing additional procedural burden.

Equally important is the role of healthcare provider communication. Targeted training in brief preventive counseling and personalized risk communication, delivered within the limited time window of endoscopic encounters, can improve patient engagement, increase screening adherence, and strengthen long-term behavioral modification. Effective physician-patient interaction has been shown to be a key determinant of preventive health decision-making and screening participation[57].

At the system level, integrating screening programs with community-based cancer control initiatives and digital follow-up systems for continuous risk communication can improve accessibility, equity, and participation rates, particularly in high-incidence and resource-limited regions[5]. Additionally, technological innovations such as artificial intelligence-assisted endoscopy and capsule endoscopy are reshaping preventive screening by enhancing detection accuracy, reducing procedural burden, and improving patient compliance[58].

Importantly, the evaluation framework of screening programs should evolve accordingly. Instead of focusing solely on detection rates, future assessments should incorporate comprehensive indicators including behavioral modification, long-term risk reduction, cost-effectiveness, and population health benefits, and comparative economic evaluations against conventional detection-centered screening strategies. Such a paradigm shift aligns screening outcomes with broader oncologic prevention goals[59-61].

IMPLEMENTATION CHALLENGES AND FUTURE DIRECTIONS IN PRECISION PREVENTION-ORIENTED SCREENING

Despite its theoretical advantages, the transition from detection-centered screening to precision primary prevention faces multiple implementation challenges, including clinical, economic, and resource-related constraints. Health system limitations, policy misalignment, and insufficient infrastructure may hinder the integration of behavioral intervention and risk stratification into routine screening workflows, and the incremental costs associated with training, counseling, and digital follow-up also warrant careful economic evaluation in real-world settings, particularly in resource-limited healthcare systems with constrained endoscopic capacity and workforce availability. Moreover, endoscopic screening may also introduce potential unintended consequences, including overdiagnosis, psychological burden related to screening anxiety, and increased healthcare resource consumption. It should be noted that the present framework is primarily conceptual and hypothesis-generating, and several proposed mechanisms require further empirical validation. Therefore, while precision prevention-oriented screening offers theoretical advantages, its potential benefits should be interpreted alongside these possible harms to maintain a balanced and evidence-based perspective. In particular, the feasibility and scalability of precision prevention-oriented screening may differ substantially between high-income and resource-constrained healthcare systems, warranting context-specific implementation strategies.

Moreover, socioeconomic disparities, cultural differences, and variations in healthcare system structure and resource allocation significantly influence screening acceptability and preventive effectiveness. Tailored communication strategies and culturally sensitive program designs are essential to ensure equitable access and sustained participation across diverse populations[57].

Future research should focus on validating sustainable implementation models that integrate behavioral science, precision risk assessment, and digital follow-up within structured screening pathways, across diverse healthcare systems and real-world clinical settings. Large-scale prospective studies are needed to quantify the long-term impact of screening-triggered behavioral modification through standardized behavioral outcome measures on cancer incidence, health economics, and population-level cancer control, while also requiring careful consideration of potential overdiagnosis, patient burden, and healthcare resource allocation.

Ultimately, redefining endoscopic screening as a precision primary prevention platform may represent a critical evolution in oncologic prevention. By shifting from a purely diagnostic paradigm to a multidimensional preventive framework, screening programs may achieve greater long-term effectiveness in reducing carcinogenic exposure, improving health behaviors, and mitigating the global burden of UGI cancers.

CONCLUSION

In conclusion, reframing UGI endoscopic screening from a detection-centered secondary prevention tool to a precision primary prevention platform may represent a conceptual paradigm shift in oncologic prevention. Accumulating evidence suggests that screening participation improves early cancer detection while enhancing risk perception and potentially contributing to behavioral modification and individualized risk management. By integrating behavioral intervention, molecular risk stratification, digital follow-up, and structured health education into organized screening pathways, endoscopic programs can evolve into multidimensional prevention systems that reduce long-term carcinogenic exposure and optimize population-level cancer control. Future research should prioritize prospective implementation models and comprehensive evaluation frameworks that move beyond detection rates to include behavioral outcomes, cost-effectiveness, and long-term cancer incidence reduction, thereby fully realizing the preventive potential of precision-oriented screening strategies.