Livedo Racemosa — SCE Dermatology MCQ
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Correct answer: A — Persistent broken irregular arcs beyond limbs that do not disappear with warming
Explanation lettering: C = shown as B · B = shown as C · E = shown as D · D = shown as E
A is correct. Livedo racemosa is formed by irregular, broken and often widely distributed segments that persist with warming. Physiological livedo reticularis produces regular closed rings on cold limbs and usually fades with warming. Erythema ab igne and cutis marmorata telangiectatica congenita are fixed but have different exposure and congenital patterns.
Reference: DermNet: livedo reticularis: https://dermnetnz.org/topics/livedo-reticularis