Findings: A PA angiographic view of the right kidney demonstrates multiple intra-renal microaneurysms. Delayed images demonstrate residual contrast material within the aneurysms. The main renal artery is unremarkable.

Diagnosis: Polyarteritis Nodosa.

Discussion: The differential diagnosis for intra-renal microaneurysms includes vasculitities, mycotic aneurysms and a speed kidney. Delayed arterial images demonstrate residual blush of contrast within the aneurysms.

This differential diagnosis differs from aneurysms involving the main renal artery and includes trauma, atheroscerlosis, fibromuscular dysplasia, neurofibromatosis and congenital.

References:
Kadir S. Diagnostic Angiography. W. B. Saunders,
Philadelphia; 1986:452-453.

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