Abstract
A 27-year-old man presented at the emergency room with episodic acute headaches and nausea for a few weeks. Neurological examination was normal.
Highlights
A 27-year-old man presented at the emergency room with episodic acute headaches and nausea for a few weeks
Low attenuation lesions are depicted in the anterior horn of the left ventricle
On B, similar very small low attenuation lesions are scattered in the subarachnoidal space of the Sylvian fissure bilaterally and the ambient cistern
Summary
A 27-year-old man presented at the emergency room with episodic acute headaches and nausea for a few weeks. Axial non-enhanced CT image of the brain (Fig. 1) shows a large tumor in the anterior horn of the right lateral ventricle with low attenuation (-128 HU) and calcifications. Low attenuation lesions are depicted in the anterior horn of the left ventricle. On B, similar very small low attenuation lesions are scattered in the subarachnoidal space of the Sylvian fissure bilaterally and the ambient cistern. MRI of the brain (Fig. 2) shows on transverse FLAIR image (A) mixed intensities in the tumor at the right lateral ventricle with a hyperintense “cap”. The lesion in the left frontal horn is hyperintense. On transverse gadolinium-enhanced T1-weighted image (B), the tumor shows no enhancement. The “cap” in the right frontal horn and lesion in the left frontal horn are spontaneously hyperintense on native T1weighted images (not shown)
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