“…Utz, and Woolner, 1962;Ormond, 1962;Kay, 1963;Que and Mandema, 1964;Reidbord and Hawk, 1965). Other features suggestive of a connective tissue disorder which have been described in association with idiopathic retroperitoneal fibrosis are pleural effusion (Hawk and Hazard, 1959;Kay, 1963), pericarditis (Kay, 1963;Reidbord and Hawk, 1965), changing radiological markings in the lungs (Hoffman and Trippel, 1961), arthropathy (Kay, 1963), pulmonary fibrosis, Raynaud's syndrome (Que and Mandema, 1964), muscle tenderness (Reidbord and Hawk, 1965), and purpura (Hache, Utz, and Woolner, 1962;Reidbord and Hawk, 1965).…”