235

FIGURE 235-1

FIGURE 235-2

FIGURE 235-3

FINDINGS Figure 235-1. Axial post-contrast CT through the temporal lobes. There is a vague left temporal lobe hypodensity with a possible vague ring enhancement in the left parasellar region (arrow). Figure 235-2. Axial FLAIR MR through the temporal lobes. There is a confluent medial left temporal lobe hyperintensity with lateral peripheral finger-like projections consistent with vasogenic edema (arrow). Figure 235-3. Axial post-contrast T1WI through the temporal lobes. There is a 1.5-cm thick ring enhancement in the medial left temporal lobe just lateral to the left cavernous sinus (arrow). MRA obtained subsequently showed no aneurysm.

DIFFERENTIAL DIAGNOSIS Ganglioglioma, high-grade astrocytoma, abscess.

DIAGNOSIS Langerhans cell histiocytosis (LCH).

DISCUSSION

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