Very frequent MRCP exam question, especially Part 1 & 2a, don't be surprised if it comes out in Station 5 PACES.
The picture shows erythematous nodules over the legs involving the shin. They are tender and elevated.
My diagnosis is that this patient has erythema nodosum.
You need to know the causes !
May even appear in history taking if you read Mir &Ryder PACES
Idiopathic/ unknown
Sarcoidosis
Streptococcal infection
Tuberculosis
Infections other than TB or strep - HIV...
Pregnancy or oral contraceptives
Drugs other than OCAs
Inflammatory bowel disease
Behcet's disease
Other
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