40-some y/o male with widespread, asymptomatic purple macule | Figure 1

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40-some y/o male with widespread, asymptomatic purple macules, plaques and nodules on trunk and extremities. The lesions are smooth, have clear-cut borders, the nodular ones have a rubbery consistence on palpation. He also displays a vegetating mass and purplish macules on the palate. What diagnosis would you suspect? What tests, if any, would you order next?