MUC5AC and purpura: Additional findings included vacuolar changes in 36 cases, spongiosis changes in 27 cases, mucin deposits in 22 cases, red cell extravasation in 18 cases, fibrin deposition in eight cases, purpura in seven cases, vascular ectasia in three cases, dilated blood vessels in two cases, necrosis in two cases, and degeneration of endothelial cells in one case (6, 10, 11, 18–20, 22, 26, 35, 41, 45, 51, 52).