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Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
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Henoch - Schonlein purpura is characterized by the deposition of the following immunoglobulin around the vessels :
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The correct answer is  Answer is C (IgA): The presumptive pathogenic mechanism for Henoch-Schonlein purpura is immune complex deposition on endothelium of blood vessels throughout the body and within glomerular mesangial regions. IgA is the antibody class most often seen in the immune complexes and has been demonstrated in the renal biopsies of these patients' - Harrison.