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Which of the following skin reactions is characterized by symmetrical, red, tender nodules that are 1 to 5 cm in diameter and are usually located over the pretibial surfaces?
1. Erythema multiforme
2. Erythema nodosum
3. Fixed drug eruption
4. Hereditary angioedema
5. Urticaria
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Yes it is Erythema nodosum
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Can anybody list the causes of it ?
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2
sarcoidosis
IBD
coccidio....
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2, and a patient come with this, what is the next step ?
Do CXR to see any lung involvement, caused by Step, you can also do ASO titer.
The same concept was asked in UW q
