Spot Dx — What’s causing these puzzling itchy purple papules?

A 41-year-old receptionist presents with a three-year history of spreading, small, itchy, purplish plaques over her hands, palms, wrists, anterior lower limbs and feet. 

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A 41-year-old receptionist presents with a three-year history of spreading, small, itchy, purplish plaques over her hands, palms, wrists, anterior lower limbs and feet. 

These lesions first appeared as small purplish papules on her anterior lower limbs and later spread to her hands, palms, wrists and feet.