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Astrocytic tumours.

D Margain1, P Peretti-Viton, O Arnaud

  • 1Service de Neuroradiologie, CHU Timone, Marseille, France.

Journal of Neuroradiology = Journal De Neuroradiologie
|January 1, 1991
PubMed
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Astrocytic tumors, a common brain tumor type, are graded by imaging. Magnetic Resonance Imaging (MRI) is crucial for diagnosing these tumors, especially low-grade astrocytomas, and guiding treatment.

Area of Science:

  • Neuro-oncology
  • Radiology
  • Neurosurgery

Background:

  • Astrocytic tumors represent nearly 50% of all brain tumors.
  • They are classified into benign astrocytomas, anaplastic astrocytomas, and malignant glioblastomas.
  • Clinical presentation varies from epileptic seizures in benign cases to rapid neurological deficits in glioblastomas.

Purpose of the Study:

  • To highlight the diagnostic utility of Magnetic Resonance Imaging (MRI) in astrocytic tumors.
  • To emphasize the role of contrast-enhanced MRI in tumor grading.
  • To recommend MRI protocols for detecting low-grade astrocytic lesions.

Main Methods:

  • Review of neuroradiological features of astrocytic tumors.
  • Evaluation of contrast enhancement patterns with iodine-based or paramagnetic agents.

Related Experiment Videos

  • Utilization of T2-weighted spin-echo MRI sequences for lesion detection.

    • Main Results:

    • Contrast enhancement is characteristic of glioblastomas, while low-grade astrocytomas typically do not enhance.
    • MRI provides superior anatomical detail for preoperative and pretherapeutic evaluation.
    • MRI is essential for confirming low-grade tumors missed by CT scans.

    Conclusions:

    • MRI is indispensable for the comprehensive study and management of astrocytic tumors.
    • Contrast-enhanced MRI aids significantly in differentiating tumor grades.
    • Adults with new-onset epileptic seizures require MRI investigation to rule out astrocytic tumors.