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Home arrow-right-small-blue Quizzes arrow-right-small-blue Mixed diagnoses – 10 cases (8 of 11)

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Quiz
Mixed diagnoses – 10 cases (8 of 11)

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 five 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 5

The appearance illustrated was noticed on the thighs of a 75-year-old lady.

The patient has "erythema ab igne", a reticulated reddish brown pigmentation.

Erythema ab igne is due to chronic exposure to infrared radiation. Initial erythema is followed by hyperpigmentation after repeated prolonged exposure to the source of heat. The pigmentation is due to melanin and haemosiderin deposition and may persist indefinitely. Erythema ab igne may arise from sitting by a stove or heater or from applying a hot water bottle (as in the case illustrated).

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