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Neuropathic Pain Features in Patients with Bone Metastases.

N Nakamura1, O Takahashi2, S Zenda3

  • 1Department of Radiation Oncology, National Cancer Center Hospital East, Kashiwa, Japan; Department of Radiation Oncology, St. Luke's International Hospital, Tokyo, Japan.

Clinical Oncology (Royal College of Radiologists (Great Britain))
|November 6, 2015
PubMed
Summary

A significant number of patients with bone metastases experience neuropathic pain, impacting palliative radiotherapy effectiveness. Further research is needed to understand this pain and its treatment response.

Keywords:
Bone metastasesneuropathic painpalliative radiotherapyradiotherapy

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Area of Science:

  • Oncology
  • Pain Medicine
  • Radiotherapy

Background:

  • Neuropathic pain features are common in patients with painful bone metastases.
  • Understanding the prevalence of neuropathic pain is crucial for optimizing palliative radiotherapy.
  • Validated screening tools exist, but their application in this specific patient group requires further study.

Purpose of the Study:

  • To estimate the prevalence of neuropathic pain features in patients receiving palliative radiotherapy for painful bone metastases.
  • To identify potential correlations between neuropathic pain features and patient characteristics.
  • To assess the impact of neuropathic pain on the response to palliative radiotherapy.

Main Methods:

  • A cohort survey of 87 consecutive patients receiving palliative radiotherapy for painful bone metastases was conducted.
  • Patients were prospectively assessed using a validated Japanese screening questionnaire for neuropathic pain components.
  • Pain response was evaluated 2 months post-radiotherapy using International Bone Metastases Consensus Working Party criteria.

Main Results:

  • Twenty-four percent of patients (95% CI: 16-35%) were diagnosed with pain exhibiting neuropathic features.
  • No significant correlations were found between neuropathic pain features and patient characteristics on multivariate analysis.
  • Overall response rates to radiotherapy were similar between patients with and without neuropathic pain features (59% vs. 55%).

Conclusions:

  • A considerable proportion of patients with painful bone metastases present with neuropathic pain features.
  • Further research is warranted to validate symptom assessment tools and clarify the influence of neuropathic pain on radiotherapy response.
  • Investigating pain distribution and imaging findings alongside symptom assessment may improve understanding.