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[11C]L-methionine uptake in gliomas
J M Derlon1, C Bourdet, P Bustany
1Department of Neurosurgery, C.H.U. Caen, France.
Neurosurgery
|November 1, 1989
Summary
Positron emission tomography (PET) with [11C]L-methionine shows increased uptake in gliomas, correlating with tumor grade. This technique offers a promising method for assessing regional brain tumor metabolism.
Area of Science:
- Neuro-oncology
- Nuclear Medicine
- Medical Imaging
Background:
- Glioma treatment outcomes remain poor despite extensive research.
- Conventional methods for assessing brain tumor metabolism are insufficient.
- Positron emission tomography (PET) offers potential for improved tumor assessment.
Purpose of the Study:
- To evaluate the utility of [11C]L-methionine PET for measuring regional methionine uptake in gliomas.
- To correlate methionine uptake with glioma histological grade.
Main Methods:
- Twenty-two patients with gliomas underwent [11C]L-methionine PET scans.
- Regional cerebral blood volume was measured using 68GaCl3.
- A ratio (R) of tumor to contralateral healthy tissue activity was calculated.
- R values were correlated with histological tumor grading (II, III, IV).
Main Results:
- Mean R values increased with glioma grade: Grade II (1.04 ± 0.27), Grade III (1.68 ± 0.22), and Grade IV (2.33 ± 0.86).
- Higher methionine uptake correlated significantly with higher tumor grade.
Conclusions:
- [11C]L-methionine PET is a valuable tool for assessing regional brain tumor metabolism.
- This PET technique shows promise in differentiating glioma grades based on metabolic activity.