7: Photodermatology and porphyria Flashcards Preview

Dermatology Week 1 2017/18 > 7: Photodermatology and porphyria > Flashcards

Flashcards in 7: Photodermatology and porphyria Deck (4)
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1

What is photosensitivity?

Symptoms caused by the exposure of skin to the UV radiation from the sun

2

What is the Fitzpatrick scale?

Scale of skin types and what happens to them upon exposure to the sun (burn vs. tan)

3

What are the porphyrias?

Group of diseases caused by abnormal haem metabolism - genetic mutations cause enzyme blocks.

The ones we need to know:

Acute intermittent porphyria (acute attacks, no skin symptoms)

Porphyria cutanea tarda

Erythropoietic protoporphyria (both present as photosensitivity)

4

See OneNote for summaries

Questions of acute intermittent porphyria: https://www.valuemd.com/usmle-step-1-forum/1309-question-stem-5-porphyria-questions.html