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Tumefactive demyelinating lesions: a clinicopathological correlative study.

R Neelima1, K Krishnakumar, M D Nair

  • 1Department of Pathology, Sree Chitra Tirunal Institute of Medical sciences and Technology, Trivandrum, Kerala, India.

Indian Journal of Pathology & Microbiology
|March 5, 2013
PubMed
Summary

Tumefactive demyelinating lesions (TDL) can mimic brain tumors on MRI scans. Neuronavigation biopsy is crucial for diagnosing TDL, even when initial imaging is inconclusive, guiding effective treatment strategies.

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Area of Science:

  • Neurology
  • Neuro-oncology
  • Pathology

Background:

  • Tumefactive demyelinating lesions (TDL) are rare central nervous system inflammatory conditions.
  • TDL often present with imaging characteristics that overlap with intra-axial neoplasms, particularly gliomas.
  • Accurate differentiation is critical for appropriate patient management.

Purpose of the Study:

  • To describe the clinical, neuroimaging, and neuropathological features of six TDL cases.
  • To evaluate the diagnostic utility of neuronavigation-guided biopsy in TDL.
  • To assess treatment responses in TDL patients.

Main Methods:

  • Retrospective review of six patients diagnosed with TDL.
  • Analysis of clinical presentations, magnetic resonance imaging (MRI) findings, and histopathological results.
  • Evaluation of treatment outcomes including corticosteroid therapy and plasma exchange.

Main Results:

  • Four out of six patients had initial MRI findings suggestive of glioma, not TDL.
  • Neuronavigation/stereotactic biopsy successfully established the diagnosis of TDL in all six cases.
  • Two patients refractory to corticosteroids showed improvement with plasma exchange.

Conclusions:

  • Neuronavigation biopsy is an invaluable tool for diagnosing TDL, especially when imaging is ambiguous.
  • TDL management may require alternative therapies like plasma exchange for non-responders.
  • Early and accurate diagnosis of TDL impacts treatment decisions and patient outcomes.