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 4

Name this red-coloured skin lesion.

Actinic (solar) keratosis with dermoscopic view

Describe its characteristics

Actinic (solar) keratosis is often pink or red. When solitary, it is usually found on face (nose, temple, upper lip, eyebrow) or hand. Although often a flat patch, it is characterised by horny adherent scale. Dermatoscopic examination reveals a red vascular and scaly network around follicular orifices (strawberry pattern).

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