FIG 3. Images from the case of a 5-day-old female patient with a large occipital mass thought to be an encephalocele.

A, Sagittal T1-weighted MR image shows a large occipital mass with intermediate signal intensity.

B, More heterogeneous appearance can be seen on the T2-weighted image. No intracranial communication is shown.

C, Selected MR digital subtraction angiograms show rapid opacification of the lesion during the early arterial phase. Flow in this lesion was so high that the intracranial vessels are poorly shown. Pathologic examination revealed an undifferentiated highly vascular tumor.