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Updated: Jul 27, 2025

Diffusion Tensor Magnetic Resonance Imaging in Chronic Spinal Cord Compression
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Spinal Reirradiation-Mediated Myelopathy: A Systematic Review and Meta-Analysis.

A Amraee1, M R Tohidkia2, L Darvish3

  • 1Research Center for Pharmaceutical Nanotechnology, Tabriz University of Medical Sciences, Tabriz, Iran; Department of Medical Physics, School of Medicine, Lorestan University of Medical Sciences, Khorramabad, Iran.

Clinical Oncology (Royal College of Radiologists (Great Britain))
|June 10, 2023
PubMed
Summary

Spinal reirradiation is common for recurrent pain, but data on side effects like myelopathy are limited. This meta-analysis found that specific biological effective dose (BED) levels and dose intervals can help prevent myelopathy and control pain.

Keywords:
Biological effective dosemyelopathyreirradiationspinal cordtheranostic

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Area of Science:

  • Radiation Oncology
  • Medical Physics
  • Clinical Neuroscience

Background:

  • Spinal reirradiation is a common treatment for patients with persistent or recurrent pain, affecting approximately 42% of cases.
  • Limited data exist on the efficacy and safety of spinal reirradiation, particularly concerning the risk of myelopathy and other side effects.

Approach:

  • A comprehensive meta-analysis was conducted, searching major electronic databases from 2000 to 2022 for relevant studies.
  • Seventeen primary studies were included to estimate pooled effect sizes for biological effective dose (BED) and dose intervals.
  • Random effects models were employed to determine safe dosage parameters for spinal reirradiation.

Key Points:

  • The pooled biological effective dose (BED) for the first and second stages of spinal reirradiation were estimated at 77.63 Gy and 58.35 Gy, respectively.
  • The cumulative BED for BED1 and BED2 was estimated at 115.34 Gy.
  • The pooled dose interval between the first and second radiation phases was determined to be 13.86 months.

Conclusions:

  • Appropriate biological effective dose (BED) and a safe dose interval are crucial for minimizing myelopathy risk during spinal reirradiation.
  • Optimizing BED1 and/or BED2 within a safe interval can significantly improve pain control and reduce adverse effects in patients undergoing spinal reirradiation.