The authors declare that they have no competing interest.
AGI, JC designed the study and the analysis. AGI, JC, AN, JLG, CC, OH, EH, PB, RC, AI, PW, FC, VM collected de clinical data. AGI, AI, JIP contributed to interpretation of data. All authors have given final approval of the manuscript.
Palliative radiotherapy (RT) is an effective treatment for symptomatic bone metastases. Pain flare, a transient worsening of the bone pain after RT, has been described in previous reports with different incidence rates. The aim of the study was to prospectively evaluate the incidence of pain flare following RT for painful bone metastases and evaluate its effects on pain control and functionality of the patients.
Between June 2010 and June 2014, 204 patients were enrolled in this study and 135 patients with complete data were evaluable. Pain flare was defined as a 2- point increase in worst pain score as compared with baseline with no decrease in analgesic intake or a 25 % increase in analgesic intake as compared with baseline with no decrease in worst pain score. All pain medications and worst pain scores were collected before, daily during, and for 10 days after RT. The Brief Pain Inventory (BPI) was filled out on the pretreatment and at the 4 weeks follow-up visit.
There were 90 men (66.7 %) and 45 women (33.3 %). Mean age was 66 years (SD 9.8). The most common primary cancer site was lung in 42 patients (31.1 %), followed by prostate in 27 patients (20.0 %). Forty-two patients (31.1 %) patients received a single fraction of 8 Gy and 83 (61.5 %) received 20 Gy in five fractions.
The overall pain flare incidence across all centers was 51/135 (37.7 %). The majority of pain flares occurred on days 1–5 (88.2 %). The mean duration of the pain flare was 3 days (SD: 3). There were no significant relationships between the occurrence of pain flare and collected variables.
All BPI items measured four weeks after end of RT showed significant improvement as compared with pretreatment scores (p < 0.001). No significant differences in BPI time trends were found between patients with and without flare pain.
Pain flare is a common event, occurring in nearly 40 % of the patients that receive palliative RT for symptomatic bone metastases. This phenomenon is not a predictor for pain response.
Cole DJ. A randomized trial of a single treatment versus conventional fractionation in the palliative radiotherapy of painful bone metastases. Clin Oncol (R Coll Radiol). 1989;1:59–62. CrossRef
Sze WM, Shelley M, Held I, et al. Palliation of metastatic bone pain: single fraction versus multifraction radiotherapy - a systematic review of the randomised trials. Cochrane Database Syst Rev. 2004;2:CD004721. PubMed
Hird A, Zhang L, Holt T, et al. Dexamethasone for the prophylaxis of radiation-induced pain flare after palliative radiotherapy for symptomatic bone metastases: a phase II study. Clin Oncol (R Coll Radiol). 2009;21:329–35. CrossRef
Sayed MM. The Effect of Systemic Steroids on the Incidence of Bone Pain Flare with Palliative Irradiation. Middle East Journal of Cancer. 2014;5:83–89.
Nguyen J, Chow E, Zeng L, et al. Palliative response and functional interference outcomes using the Brief Pain Inventory for spinal bony metastases treated with conventional radiotherapy. Clin Oncol (R Coll Radiol). 2011;23:485–91. CrossRef
Wu JS, Monk G, Clark T, et al. Palliative radiotherapy improves pain and reduces functional interference in patients with painful bone metastases: a quality assurance study. Clin Oncol (R Coll Radiol). 2006;18:539–44. CrossRef
- Incidence of pain flare following palliative radiotherapy for symptomatic bone metastases: multicenter prospective observational study
Jose Luis Lopez-Guerra
Olga Del Hoyo
Jose Ignacio Pijoan
- BioMed Central
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