Published in:
01-05-2005 | Case Report
Proton magnetic resonance spectroscopic imaging in pediatric pilomyxoid astrocytoma
Authors:
Bayram Cirak, Alena Horská, Peter B. Barker, Peter C. Burger, Benjamin S. Carson, Anthony M. Avellino
Published in:
Child's Nervous System
|
Issue 5/2005
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Abstract
Objects
A pilomyxoid astrocytoma (PmA) is considered to be either a more aggressive variant of a pediatric pilocytic astrocytoma (PA) or a tumor of a separate entity.
Methods
We present two cases of pediatric optic-chiasmatic PmA. Proton magnetic resonance spectroscopic imaging (MRSI) of the PmA revealed decreased concentrations of total choline (Cho), creatine (Cr), and N-acetyl aspartate (NAA). In contrast, proton MR spectra of PAs showed elevated Cho and decreased Cr and NAA signals.
Conclusion
Low metabolite concentrations in PmAs detected by MRSI may therefore help to distinguish PmAs from PAs preoperatively.