Context: Meta-analyses demonstrate single-fraction radiotherapy to be as effective as multi-fraction treatment in palliating painful bone metastases, although surveys suggest reluctance in prescribing single fractions.Aims: Assess the factors influencing the choice of dose-fractionation regimen in an unselected population; examine retreatment rates and subsequent skeletal events.Methods: Data were extracted from case notes for 120 patients treated in 2000 and 2006 in a single centre serving a defined population; analysis used x 2 and Fisher's exact statistical tests.Results: An 8 Gy fraction was the commonest regimen prescribed (single-fraction delivery rate 53?6%). Tumour site was a significant factor in choice of dose-fractionation schedule. Patients with metastatic breast carcinoma were significantly less likely to receive single-fraction treatment compared with those with metastatic lung carcinoma (year 2000: p 5 0?038, 2006: p 5 0?001). There was a significantly higher retreatment rate following single-fraction compared with multi-fraction treatment (11% versus 3%). There were two subsequent neural axis compressions and four pathological fractures.Conclusions: Single-fraction treatment is the commonest regimen but multiple fractions are still frequently delivered. Better prognosis groups appear more likely to receive multi-fraction treatment, possibly to avoid the need for retreatment. Subsequent skeletal events are rare but carry high morbidity when they occur.
IMRT with inverse planning enabled us to achieve desired dose distribution, due to its ability to provide sharp dose gradients at the junction of tumor and the adjacent critical organs.
Background and purpose: Intensity modulated radiotherapy (IMRT) is a powerful tool, which might go a long way in reducing radiation doses to critical structures and thereby reduce long term morbidities.
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