ed initially in 40% and eventually in 80%, with symptoms including cough, dyspnea, and hemoptysis; Other early symptoms can include unilateral proptosis (from pseudotumor), red eye from scleritis, arthritis, purpura, and dysesthesia due to neuropathy; Renal involvement, which develops in three-fourths of the cases, may be subclinical until renal insufficiency is advanced.