<prompt> Henoch-Schonlein purpura is characterized by the deposition of the following immunoglobulin around the vessels:IgMIgGIgAIgE  <response>: c. IgARef: Nelsons 20e p 1216-1217, Ghai 8e p 632-633Biopsy finding in HSP is deposition of IgA, specifically lgA1 in the affected tissue, by immunofluorescence, accompanied to a lesser extent by deposition of C3, fibrin IgM. 