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Tumefactive demyelinating lesions versus CNS neoplasms, a comparative study.

Sin Hong Chew1, Hairuddin Bin Achmad Sankala2, Elaine Chew1

  • 1Department of Neurology, Kuala Lumpur Hospital, Jalan Pahang, 50586 Kuala Lumpur, Malaysia.

Multiple Sclerosis and Related Disorders
|September 17, 2023
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Summary

Differentiating tumefactive demyelinating lesions (TDL) from brain tumors like high-grade gliomas (HGG) and primary CNS lymphoma (CNSL) is crucial. This study highlights key clinical and imaging differences to aid diagnosis.

Keywords:
CNS neoplasmsHigh-grade gliomaMagnetic resonance imagingPrimary CNS lymphomaTumefactive demyelinating lesions

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Area of Science:

  • Neurology
  • Radiology
  • Oncology

Background:

  • Differentiating tumefactive demyelinating lesions (TDL) from central nervous system (CNS) neoplasms presents a significant diagnostic challenge.
  • Neoplasms such as high-grade gliomas (HGG) and primary CNS lymphoma (CNSL) can mimic TDLs radiologically.

Purpose of the Study:

  • To compare the clinical and radiological features of TDL, HGG, and CNSL.
  • To identify distinguishing characteristics that aid in the early diagnosis of these conditions.

Main Methods:

  • Retrospective review of 66 patients: 23 TDL, 31 HGG, and 12 CNSL.
  • Analysis of clinical, laboratory, and brain MRI data by two blinded neuroradiologists.

Main Results:

  • TDL patients were younger and predominantly female, presenting with sensorimotor deficits and ataxia.
  • HGG and CNSL patients more commonly experienced headaches and altered mental status.
  • MRI findings suggestive of TDL included smaller size, less mass effect, incomplete rim enhancement, and absence of restricted diffusion compared to HGG and CNSL.

Conclusions:

  • Distinct clinical and radiological features can help differentiate TDLs from CNS neoplasms at initial presentation.
  • Careful evaluation of imaging characteristics is essential for accurate diagnosis and management.