Page 179 - Atlas of Small Animal CT and MRI

Figure 2.3.5 Lissencephaly (Canine) MR

(a) T1, TP (b) T2, TP (c) PD, TP

(d) T1, SP
Lhasa Apso of unknown age. The normally complex surface convolutions of the cortical gyri and sulci are absent and mild, generalized
hydrocephalus is present (a–d). In addition, there is a striking lack of white‐matter architectural detail (c). This dog also has a quadrigeminal
arachnoid cyst (d: arrow).

Figure 2.3.6 Complex Cortical Developmental Anomaly (Feline) MR

4mo F Domestic Shorthair with obtunda-
tion and rotary nystagmus. Representative
transverse and parasagittal images reveal a
complex brain anomaly that includes profound
hydrocephalus and abnormal cortical and cor-
pus callosum development (a–c). Postmortem
examination documented hydrocephalus,
hypoplasia of the corpus callosum, cortical
gyral malformation, and pachygyria (d).

(a) T1, TP (b) T2, TP

(c) T1, SP (d) GP, TP