It was reported that a patient with concurrent prostate cancer underwent a surgery using an interspinous process spacer at l4/l5.Thirty-two days post-op during the one-month follow-up, imaging examination (i.E., x-ray) was performed, showing the spacer had migrated backward.No additional surgery or other treatment were performed.The event severity was non-serious.The event outcome was reported to be no health damage on (b)(6) 2012.The physician commented that the event could be partially attributable to the patient¿s somewhat small l5 spinous process.
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