AJDRAJNR - American Journal of Neuroradiology

This Article
Right arrow Abstract Freely available
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via CrossRef
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Majós,
Right arrow Articles by Pons, L.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by Majós,
Right arrow Articles by Pons, L.

Intraventricular Meningiomas: MR Imaging and MR Spectroscopic Findings in Two Cases

Carlos MajósGo,a, Gracia Cucurellaa, Carlos Aguileraa, Sylvia Colla and Luis C. Ponsa

a From the Institut de Diagnòstic per la Imatge (I.D.I.), Hospital Duran i Reynals, Ciutat Sanitària i Universitària de Bellvitge, Autovia de Castelldefels km 2.7, 08907 L’ Hospitalet de Llobregat, Barcelona, Spain.



View larger version (112K):

[in a new window]
  		FIG 1. 48-year-old man with a 2-month history of recurrent episodes of unsteady gait, visual loss, tinnitus, left arm paresthesia, and frontal headache.

A, Axial T2-weighted MR image shows an intraventricular meningioma in the right trigone (arrows) with heterogeneous signal, surrounded by edema. There are some enlarged vessels at the periphery of the mass (arrowheads).

B and C, Axial (B) and coronal (C) T1-weighted contrast-enhanced MR images show intense relatively homogeneous enhancement of the meningioma. Note contact with the choroid plexus (arrow, C) and posterior transtentorial herniation (arrowheads, C).

D, Axial T1-weighted MR image shows the position of the voxel for spectroscopy.

E, Localized proton MR spectrum (SE 2000/136/128) of the intraventricular meningioma shows a prominent resonance from Cho and a doublet centered at 1.47 ppm and inverted at this TE, which can be assigned to Ala.

F, Localized proton MR spectrum (SE 2000/31/128) shows a prominent resonance from Cho, a decrease in the Cr and NAA resonances, and the presence of lipids. Ala can also be assigned at this TE.



View larger version (184K):

[in a new window]
  		FIG 2. 21-year-old man with a 4-month history of progressive occipital headaches associated with nausea and unsteadiness.

A, Axial T2-weighted MR image shows a large meningioma in the right trigone (closed arrows) with heterogeneous signal intensity. There are enlarged vessels at the periphery of the mass, some of them in continuity with the choroid plexus (open arrow), and an abundance of edema in the white matter.

B, Coronal FLAIR sequence shows high signal intensity of the tumor (black arrows) and extensive peritumoral edema. Note posterior transtentorial herniation of the temporal lobe and the trigone of the lateral ventricle (white arrows).

C and D, Axial (C) and coronal (D) T1-weighted contrast-enhanced MR images show intense relatively homogeneous enhancement. There is focal enlargement of the occipital horn (arrows, C) with slight hyperintensity of its content due to entrapment of the horn. Posterior transtentorial herniation is well seen in the coronal planes (arrow, D).

E, Axial T1-weighted MR image shows the position of the voxel for spectroscopy.

F, Localized proton MR spectrum (SE 2000/136/128) shows a prominent resonance from Cho and an inverted doublet centered at 1.47 ppm, corresponding to Ala.

G, Localized proton MR spectrum (SE 2000/31/128) from the same voxel shows an increase in the Cho resonance, a decrease in Cr and NAA, and the presence of lipids and Ala.





Copyright © 2008 by the American Society of Neuroradiology. Print ISSN: 0195-6108 Online ISSN: 1936-959X