Blood Vessel - Polyarteritis Nodosa - Gallery

Prostate - Polyarteritis nodosa in a male B6C3F1/N mouse from a subchronic study. Abundant inflammatory cells surround a prostatic artery (arrows).

Pancreas - Polyarteritis nodosa in a male Wistar Han rat from a chronic study. Inflammation of a muscular artery is present in the pancreas (arrows).

Stomach, Glandular stomach - Polyarteritis nodosa in a male B6C3F1/N mouse from a chronic study. A thick band of inflammatory cells surrounds a small artery (arrows).

Stomach, Glandular stomach - Polyarteritis nodosa in a male B6C3F1/N mouse from a chronic study (higher magnification of Figure 3). A hypereosinophilic band of necrotic tissue is present in the vessel wall (arrow).

Mesentery - Polyarteritis nodosa in a female F344/N rat from a chronic study. Multiple areas of fibrosis (arrows) are present along the length of a medium-sized muscular artery in the mesentery.

Mesentery - Polyarteritis nodosa in a female F344/N rat from a chronic study (higher magnification of Figure 5). The adventitia of a mesenteric artery (arrow) is thickened by proliferation of fibroblasts and collagen.

Mesentery - Polyarteritis nodosa in a female F344/N rat from a chronic study (higher magnification of Figure 5). There is fibrosis of the adventitia of a mesenteric artery.