“…The chemical compounds, other than sulphonamides, sensitivity to which has been held responsible for polyarteritis nodosa are: desoxycorticosterone acetate (Selye et al, 1944), thiourea (Gibson and Quinlan, 1945), organic arsenicals (Miller and Nelson, 1945), and iodine (Rich, 1945). In our case there was no history of exposure to any of these drugs.…”