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Imaging features of intraventricular melanoma
A Arbelaez1, M Castillo, D M Armao
1Department of Radiology, University of North Carolina School of Medicine, Chapel Hill 27599, USA.
AJNR. American Journal of Neuroradiology
|May 13, 1999
Summary
This study details MR imaging of a rare primary intraventricular melanoma causing increased intracranial pressure. The findings suggest a possible choroid plexus origin for this unusual brain tumor.
Area of Science:
- Neurology
- Radiology
- Oncology
Background:
- Increased intracranial pressure can be caused by various intracranial masses.
- Intraventricular tumors are rare and can present with diverse clinical and imaging features.
Observation:
- Magnetic resonance (MR) imaging revealed a mass in the left lateral ventricle in a patient with symptoms of elevated intracranial pressure.
- The intraventricular mass demonstrated characteristic signal intensities on T1-weighted (high) and T2-weighted (low) images.
Findings:
- Histologic examination confirmed the mass as melanoma.
- No evidence of a primary cutaneous or ocular melanoma lesion was found during physical and funduscopic examinations.
- The findings are consistent with a primary intraventricular melanoma, potentially originating from the choroid plexus.
Implications:
- This case highlights the possibility of primary intraventricular melanoma, a rare entity.
- Understanding the imaging characteristics is crucial for diagnosis.
- Further research into the pathogenesis of primary intraventricular melanomas is warranted.