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AJNR - American Journal of Neuroradiology

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American Journal of Neuroradiology 20:691-693 (4 1999)
© 1999 American Society of Neuroradiology

ARTICLE

Imaging Features of Intraventricular Melanoma

Andres Arbelaez^a, Mauricio Castillo^,a and Diane M. Armao^a

^a From the Departments of Radiology (A.A., M.C.) and Pathology (D.M.A.), University of North Carolina School of Medicine, Chapel Hill.

Summary: We present the MR imaging findings in a patient with symptoms of increased intracranial pressure and a mass in the left lateral ventricle. The mass showed increased signal intensity on T1-weighted images and low signal intensity on T2-weighted images. The histologic diagnosis was that of melanoma, and detailed physical and funduscopic examinations disclosed no evidence of a primary lesion. We believe that the mass was a primary intraventricular melanoma, possibly arising from the choroid plexus, and we discuss the mechanisms that may be responsible for its occurrence in this location.

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