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On-Site Sampling and Extraction of Brain Tumors for Metabolomics and Lipidomics Analysis

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(1)H MR Spectroscopy in Gliomatosis: Is there a Sensitivity Issue?

M Szewczyk-Bieda¹, A K Kanodia, G Main

¹Department of Clinical Radiology, Ninewells Hospital and Medical School, NHS Tayside, Dundee DDI 9SY, UK.

Case Reports in Radiology

|May 19, 2012

Summary

Normal (1)H MR spectroscopy (MRS) in suspected gliomatosis does not rule out aggressive brain tumors. Follow-up imaging and biopsy are crucial for accurate glioblastoma diagnosis.

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Area of Science:

Neuroimaging
Oncology
Spectroscopy

Background:

(1)H MR spectroscopy (MRS) is a sensitive tool for brain tumor assessment, aiding in differentiating benign from malignant conditions and grading tumors.
Gliomatosis diagnosis often relies on MRI, but distinguishing between benign and malignant lesions can be challenging.

Observation:

A 69-year-old woman with suspected gliomatosis on MRI underwent (1)H MRS, which yielded normal results using single voxel and multivoxel techniques.
Despite normal MRS, the patient's condition progressed over six months, necessitating a biopsy.

Findings:

The biopsy confirmed glioblastoma, a highly aggressive brain tumor.
Initial normal (1)H MRS results were inconsistent with the eventual diagnosis of glioblastoma.

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Implications:

Normal (1)H MRS in the context of suspected gliomatosis on MRI should not lead to premature reassurance of a benign etiology.
Clinicians must maintain a high index of suspicion and consider further diagnostic steps, such as repeat imaging and biopsy, even with initially normal MRS findings.
This case highlights the limitations of MRS in excluding aggressive brain tumors and emphasizes the importance of integrating imaging findings with clinical progression and histopathological confirmation.