e23096 Background: Early childhood cancer detection reduces mortality, particularly in LMIC contexts where an improved understanding of early warning signs and symptoms (EWSS) and integration of vital referral pathways into existing health systems are crucial to improved childhood cancer outcomes. Our project seeks to adapt and implement a Ghanaian-developed EWSS intervention for Kenya and Cameroon using implementation science frameworks to move beyond the common but ineffective train-and-hope approach. Cameroon operates on a three-tiered sub-sector health system, with the intermediate level consisting of regional delegations that support districts1. In Kenya a six-tiered health system delivers primary care (1-2), mid-level care (3-4), advanced care with centers of excellence (5-6) 2. Health system contexts will inform implementation planning and execution. Methods: Health system stakeholders convened in each country to launch their EWSS initiative. Two-day meetings were collaboratively led by local stakeholders and the research team, guided by The Implementation Roadmap3, a multi-implementation framework resource. They discussed l) local barriers to childhood cancer detection, 2) referral pathways, 3) leadership and operational implementation teams, 4) sustainable EWSS training, and 4) target settings. Results: Stakeholders endorsed the EWSS program and identified individuals to form implementation teams to plan and execute implementation reflective of health system organization and realities. Both countries engaged in an evidence-based implementation planning process, reviewed EWSS core components and training logistics, and endorsed a sustainable tiered training model targeting clinicians and oncologists across system levels and institutional providers. Training content will be adapted for country, region, and county contexts. Both countries endorsed and identified district childhood cancer champions to facilitate training and coordinate timely referrals. Common implementation barriers identified included high healthcare worker turnover, transportation logistics for in-person training, and remuneration options for trainees. Conclusions: Health system leaders in Kenya and Cameroon endorsed an evidence-based EWSS implementation and sustainment approach and identified adaptations responsive to the health system contexts. Implementation will be locally led to ensure effectiveness, sustainability, and appropriate cultural EWSS adaptation. Moving forward, local implementation teams will work with researcher-facilitators to implement EWSS toward improved cancer detection rates.
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