Surgical Treatment of a Chronic Brain Abscess and Growing Skull Fracture in a Dog

Figure 5

Postoperative MR images of the head. (a) T2-weighted right parasagittal image. The shape of the right lateral ventricle is abnormal (asterisks), and there is T2-hyperintense tissue in the area previously occupied by the abscess (arrow). (b) T2-weighted transverse image at the level of the rostral third ventricle (asterisk). There is parenchymal loss on the right side, with resulting midline shift toward the right. There are extraventricular fluid pockets within the parenchyma suppressed on T2-weighted FLAIR imaging (arrow). (c) T2-weighted transverse image at the level of the caudal colliculi. There is a peripheral rim of predominantly T2-hyperintense material along the right side of the cerebrum (arrow). (d) T2-weighted transverse image at the level of the midbrain. The peripheral rim is seen ventrally and has mixed T2 signal and a layered appearance (arrow). (e) -weighted transverse image at the level of the midbrain. Signal voids within the rim (arrow) are consistent with hemorrhage. (f) Postcontrast T1-weighted transverse image at the level of the thalamus. The peripheral rim strongly and, in most areas, uniformly contrast enhanced (arrows). (g) Postcontrast T1-weighted dorsal image at the level of the mesencephalic aqueduct. Note the sharply defined margin of the peripheral contrast-enhancing material along the tentorium cerebelli (arrow).

(a)

(b)

(c)

(d)

(e)

(f)

(g)