Decreases in pain at rest and movement-related pain during zoledronic acid treatment in patients with bone metastases due to breast or prostate cancer: a pilot study.

Background: In patients with bone metastases, pain may be absent or moderate at rest, but may be exacerbated by different movements or positions. No study has evaluated separately pain at rest and on movement in patients with bone metastases undergoing treatment with zoledronic acid (ZA).

Aim: The aim of this prospective observational study was to evaluate the reduction in intensity of pain at rest and in movement-related pain after treatment with up to six infusions of ZA 4 mg every 28 days in patients with painful bone metastases due to breast or prostate cancer cared for at the Oncological Units and Pain Therapy and Palliative Care Unit of the NCI of Milano.