<prompt> All of the following conditions are associated with palpable purpura, EXCEPT:Giant cell aeritisHenoch Schonlein PurpuraWegner granulomatosisPolyaeritis nodosa  <response>: Differential diagnosis of palpable purpura includes Henoch-Schonlein purpura HSP, cryoglobulinemia or cryofibrinogenemia, polyaeritis nodosa PAN, Wegeners granulomatosis, infections, and collagen vascular disorders. Giant cell aeritis being a large vessel vasculitis does not cause any purpura. 