FIG 9. Electron microscopy findings in a type 1 lesion in a cat brains from group 2, which was treated with oleic acid (original magnification x5000). A 5-µm intravascular fat vacuole (F) is shown. Neuropil swelling (arrowheads) is prominent, and widening of the perivascular interstitial space (asterisk) is also observed. Bar indicates 1 µm.