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06/26/26

Learning from what went right: a Safety-II application of the SIDER protocol to a case of occult breast cancer.

Kamei, Takako; Shimada, Yuka; Shimura, Yu; Sugawara, Yuna; Higashihara, Riko; Yokose, Masashi; Harada, Yukinori; Shimizu, Taro. Diagnosis (Berl.)

Collection Topics
Big Three Conditions Culture, Work System, and Implementation Measurement, Monitoring, and Event Analysis
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Summary

Safety II focuses on improving care by learning from success rather than failure. This commentary applies to a structured Safety II approach to a complex metastatic breast cancer case undetectable by imaging. The authors discuss three contributors to diagnostic success in this example: assessing disease likelihood, engaging the patient, and collaborating across specialties. It shows how studying successful diagnoses can generate practical strategies for difficult cases.
Read the paper
Kamei T, Shimada Y, Shimura Y, et al. Learning from what went right: a Safety-II application of the SIDER protocol to a case of occult breast cancer. Diagnosis (Berl). Epub 2026 Jun 26.