A 31-year-old male is admitted to the hospital with a 10-day history of lower extremities rash swellings on hands and legs. He had upper respiratory tract infection before his current symptoms started. A biopsy of skin lesions at an outside hospital shows leukoclastic vasculitis. All his other laboratory results are normal, including ESR, CRP, UA, CBC, CMP. His Past medical history (PMH) is negative. Physical examination Afebrile, VSS. WD/WN in NAD.
Chest: CTA (B). CVS: Clear S1S2. Abdomen: Soft, NT, ND, +BS. What laboratory testing would you suggest? What can be the possible diagnosis? *This case is from Docplexus Editorial Team for educative purpose only.
