157

FIGURE 157-1

FIGURE 157-2

FIGURE 157-3

FIGURE 157-4 (2 months later)

FINDINGS Figure 157-1. Axial T2 FLAIR through the lateral ventricles. There is bilateral parasagittal almost symmetrical parieto-occipital subcortical patchy hyperintensities. There is a collection of hyperintense signal in the splenium of the CC on the right (arrow). Figure 157-2. Axial T2 FLAIR through the high corona radiata. There is bilateral almost symmetrical parasagittal parietal subcortical hyperintensities (arrows). Additional left periventricular hyperintensities anteriorly. Figure 157-3. Coronal post-contrast T1WI through the splenium of the CC. There is focal contrast enhancement of the splenium on the right side (arrow) corresponding to the areas of FLAIR hyperintensity. Figure 157-4. Axial T2 FLAIR through the splenium 2 months after the initial study. There is resolution of the splenium and occipital/parietal lesions.

DIFFERENTIAL DIAGNOSIS Posterior reversible encephalopathy syndrome (PRES), acute disseminated encephalomyelitis (ADEM), metastases, lymphoma, cerebral venous thrombosis, gliomatosis cerebri, multiple watershed infarcts.

DIAGNOSIS PRES of CC.

DISCUSSION

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