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Asymptomatic skin diseases that favour the axillae – 12 cases

There are several asymptomatic skin diseases that favour the axillae. Most of the conditions in this month’s quiz are rather uncommon. Check the colour, and whether the surface is smooth (a patch) or thickened (a plaque).

Four examples of brown armpits, four examples of white armpits and four examples of skin coloured papules are included.

For each of the ten 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.

When you finish the quiz, you can download a certificate.

Case 2

Lichen planus pigmentosa

Biopsy of a smooth greyish-brown patch may show lichenoid features. The area of pigmentation may follow an inflammatory episode of lichen planus, or appear without a preceding inflammatory phase, when it is called lichen planus pigmentosus. It is more often seen in Asian skin than in other ethnic groups. The cause is unknown, and no effective treatment has been described. It tends to resolve after several years.

Mark question

See smartphone apps to check your skin.
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