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Lateral Ventricular Lesions
A 20-year-old man presenting with a 2-month history of a worsening headache. ADC, apparent diffusion coefficient; Ax, axial; CT , computed tomography.
A 25-year-old woman presenting with a 2-week history of confusion (magnetic resonance imaging after a ventriculostomy for hydrocephalus). ADC, apparent diffusion coefficient; Ax, axial; CT , computed tomography; GRE, gradient refocused echo.
A 34-year-old woman presenting with a 2-week history of headache. ADC, apparent diffusion coefficient; Ax, axial; Sag, sagittal.
A 17-year-old male adolescent with chronic seizures. Ax, axial; Cor, coronal; FLAIR, fluid attenuated inversion recovery; Sag, sagittal.
A 58-year-old man presenting with a history of severe retroorbital headache for several days. ADC, apparent diffusion coefficient; Ax, axial; FLAIR, fluid attenuated inversion recovery.
DESCRIPTION OF FINDINGS
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Case A: A large, heterogeneously enhancing intraventricular mass containing small areas of intratumoral cystic change and abutting the septum pellucidum with early hydrocephalus. Note CT hyperdensity and mildly restricted diffusion.
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Case B: A hyperdense, avidly enhancing intraventricular mass with a few tiny foci of susceptibility artifact consistent with intratumoral hemorrhage or calcification.
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Case C: An avidly enhancing T2 hypointense mass in the atrium of the right lateral ventricle with peripheral restricted diffusion.
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Case D: An intraventricular mass with multiple associated cortical/subcortical foci of T2 FLAIR signal hyperintensity and subependymal nodules.
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Case E: A nonenhancing intraventricular mass with small areas of intratumoral cystic change.
Diagnosis
Case A
Central neurocytoma
Case B
Ependymoma
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