Cognitive and visual diagnostic errors in dermatology: part 1

© 2018 British Association of Dermatologists Sir William Osler famously, and ironically, stated that ‘Medicine is a science of uncertainty and an art of probability’. The processes by which each physician metes out diagnostic uncertainty and navigates probabilities in dermatology is far from uniform. While certain ubiquitous cognitive and visual heuristics can enhance diagnostic speed, they also create pitfalls and thinking traps that introduce significant variation in the diagnostic process. Discussed in this part of a two-part article are various cognitive and visual heuristics as they pertain to skin disease, with an introduction and special attention paid to the heuristic methods classically applied by dermatologists. How to best address error and improve our thought processes will be addressed in part 2

Diagnostic heuristics in dermatology, part 2: metacognition and other fixes

© 2018 British Association of Dermatologists Diagnostic errors are the most common, costly and dangerous of medical mistakes. In part 1 of this series, we described how general and dermatology-specific cognitive and perceptual biases underlie most of our correct diagnoses, as well as being a source of diagnostic medical errors. In this second part of the series, we describe some tactics to combat diagnostic error. Metacognition, or thinking about how we think, is the central approach advocated to avoid errors of ‘uncritical’ diagnostic thinking. Current individual and medical cultural attitudes need to be modified in order to incorporate improvements in diagnosis. Algorithms, artificial intelligence and system changes are being developed to address error and improve diagnostic accuracy