CD79A and Henoch-Schoenlein purpura: The patient underwent a 4 mm punch biopsy of the left medial leg and direct immunofluorescence staining, which revealed vascular deposition of IgA, C3, fibrinogen, and focal IgM resulting in a diagnosis of IgA vasculitis with thromboembolic vasculopathy, as shown in Figure 2 and Figure 3.