Dear EchoRisk Challenge Participants, Following up on our previous communication, the official technical description for the EchoRisk-MICCAI 2026 challenge has been hosted on arXiv for your reference: [EchoRisk: A Multicentre Echocardiography Dataset and Benchmark for Cardio-Oncology](https://arxiv.org/pdf/2607.01039). This manuscript details the dataset collection framework, clinical inclusion criteria, task formulations, and reference implementations. For teams currently preparing their methodology papers, this report may serve as a helpful resource to clarify specific challenge design parameters. If you wish to reference the official dataset characteristics, evaluation metrics, or baseline architectures in your submission, the citable BibTeX metadata can be found on the [arXiv page](https://arxiv.org/abs/2607.01039). Thank you for your continued participation, and we look forward to your upcoming methodology submissions. Best regards, The EchoRisk-MICCAI 2026 Organizing Committee