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Background: Between 2009-2011, 21 patients with spinal and paraspinal metastases within a previously irradiated field were treated with stereotactic radiosurgery (SRS). The patients were evaluated retrospectively. Methods: All patients had undergone conventionally fractionated external beam radiotherapy (EBRT). The SRS was delivered to a median marginal dose of 14 Gy, in a median 2 fractions. The median age was 53 years. The median follow-up period was 8 months. Results: Mean overall survival was 11.7 months for all patients. Two months after SRS, 6 (28.6%) patients had partial response, 14 (66.7%) had stable disease and 1 (4.8%) had progression. At the end of the follow-up, 4 (19%) patients developed local progression at 2, 3, 6, and 11 months, respectively. Minimal paresthesia was observed in the lower extremities in a patient in the 8th month after SRS.

Second series of reirradiation in metastatic spinal cases with CyberKnife