How do you evaluate livedo reticularis (not livideo racemosa)?

Livedo reticularis appears as an interrupted vascular network on the lower limbs. One does not need to warm up the affected area in order to make this diagnosis. The response to heat usually occurs in cutis marmorata that is found in children. Livedo reticularis when it is acquired in teenage and later usually signifies the presence of an underlying connective tissue disease. In my experience, the most common disease has been lupus erythematosus. The interval between its development and evidence...