A 42-Year-Old Man with Skin Petechia and Palpable Purpura on His Legs

The patient is a 43-year-old man who presents to urgent care with widespread skin petechia and palpable purpura on his legs. He reports these symptoms occurred around 2 weeks after he recovered from an upper respiratory tract infection. In addition, he’s experienced fever, diarrhea, and vomiting. He mentions pain in his scrotum, as well.
View the photo (Figure 1) and consider what your diagnosis and next steps would be. Resolution of the case is described on the next page.

Figure 1.