Features as Clues.

 When we look at a lesion with a dermatoscope we initially ask "Is it symmetrical or asymmetrical?" and then we look for features which give us a clue to the likeliest diagnosis. These clues we prioritise and then synthesise into two or three likely diagnoses. Sometimes the clues point strongly to only one diagnosis and if benign we go on to the next lesion. However if malignancy comes up as a strong possibility because of asymmetry and clues we excise the lesion. If a weak possibility we may choose to photograph and monitor the lesion in three months. Your tolerance for monitoring usually depends on your experience in the field. If your experience is limited excision is the better course of action especially if you are considering melanoma as a possible diagnosis.

With this in mind use this website to build up your experience in recognising these clues and the potential diagnoses. I will add a section of lesions for you to practice analysing and add some videos discussing the diagnosis.

Download the Tables in the pages area above and print them out to have them easily at hand when looking at lesions. They are set out with the likeliest diagnosis on the left and the others in likely order of probability. 

Use www.dermoscopymadesimple.blogspot.com to revise various clinical diagnoses. You can access it in Links opposite.

If you find mistakes or have suggestions for other clues and conditions email me at imccoll@ozemail.com.au