Diagnostic tools

The following tools have been developed by Professor Cliff Rosendahl of The University of Queensland and colleagues to support the accurate diagnosis of skin lesions. 

These tools should be used when a confident, specific, benign, pattern-recognition diagnosis cannot be made - such lesions are considered "lesions of concern".

These diagnostic posters were updated in 2025, marking their first revision in 10 years. This reflects the enduring integrity and clinical relevance of the original versions. 

 
Chaos, Clues and Exceptions


Use this algorithm for pigmented lesions when a confident
benign diagnosis by dermatoscopic pattern recognition cannot be made. 

2025 edition

Download (PDF)


Prediction without Pigment



Use this algorithm for non-pigmented lesions when a confident
benign diagnosis by dermatoscopic pattern recognition cannot be made. 

2025 edition

Download (PDF)

 

Further learning and reference materials

 

DermNet
 A comprehensive database of skin conditions

  

Dermoscopedia
In-depth information about dermoscopy



Dermatology Made Easy
By Professor Amanda Oakley

  


Dermatoscopy and Skin Cancer (2nd edition)
By Professor Cliff Rosendahl



SCARD
A surgical log for health professionals who treat skin malignancies in primary care

  


HealthCert Blog
Case studies, podcasts, video tutorials and medical research articles




Dermoscopy Happy Hour
YouTube channel featuring discussions on dermoscopy research and challenging cases

  



YouDermoscopy Training app
A fun app that helps improve diagnostic identification of dermatoscopic lesions


Minor Surgery: A visual guide for office-based
surgery from beginner to expert
Dr Samantha Murton