Quiz
Solitary red patches – 17 cases

One is often faced with a solitary red patch of skin to diagnose. Some clues to differentiate the most common conditions are presented in this quiz.

It is particularly important to identify malignant tumours.

For each of the seventeen cases, study the image(s) and then answer the questions. You can click on the image to view a larger version if required.

Each case should take approximately 2 minutes to complete. There is a list of suggested further reading material at the end of the quiz.

Case 3

Name this red-coloured skin lesion.

Amelanotic melanoma (recurrent) with dermoscopic view

Describe its characteristics

Amelanotic melanoma can be incredibly difficult to diagnose and may arise in any site. The dermatoscope may reveal red blotches and small areas of amorphous pigment or pigment network with irregular linear and dotted blood vessels.

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