Pulmonary artery stenosis and periarteritis nodosa.

A severe arterial stenosis involving the origin of the posterior and anterior basal branches of the right lower lobe artery was discovered in a 86 year-old Caucasian woman who presented with a typical periarteritis nodosa. We believe it was specific because its discovery was concomitant to the diagnosis of periarteritis nodosa and no other cause was obvious.