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Pigmented lesions – 10 cases

There are 10 pigmented lesions to diagnose in this quiz

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 1

Lentigo simplex.

There are various kinds of lentigo (pl. lentigines). They tend to have a uniform colour but benign lesions may have some variegation in colour (tan, brown and black). They may evolve slowly or appear suddenly. There are several genetic syndromes associated with extensive lentiginosis.
The lentigo simplex is characterised by a small number of round or oval 3-15 mm brown macules with even or jagged margin, unrelated to sun exposure. Histologically there is increased basal pigmentation due to increased numbers of melanocytes.

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