Other Purulent Inflammations

Purulent encephalitis is caused by septic emboli from the lung, heart, bone, or other distant septic foci. PNLs diffusely infiltrate the cerebral cortex and the deep gray structures (Fig. 6.4).

Thrombophlebitis of the major cranial sinuses is commonly associated with infections of the brain, ear, facial and nasal sinuses, and skin.

Mycotic aneurysm, an inflammatory necrosis of the vascular wall caused by septic emboli, carries a potential risk for rupture, with subsequent infection and intrace-rebral and subarachnoid hemorrhages.

FIGURE 6.4

Purulent encephalitis in a young woman with bacterial endocarditis. Dense perivascular and diffuse parenchymal poly-morphonuclear infiltrations are present in the cerebral cortex (cresyl violet).

FIGURE 6.4

Purulent encephalitis in a young woman with bacterial endocarditis. Dense perivascular and diffuse parenchymal poly-morphonuclear infiltrations are present in the cerebral cortex (cresyl violet).

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