Review Question - QID 219873

A 71-year-old female presents to the emergency department following a ground-level fall with an injury film shown in Figure A. Her total hip replacement was performed ten years before her presentation, but you are unable to find any post-op radiographs. You plan to perform an open reduction and internal fixation with revision of the femoral component to a modular tapered revision stem, but intraoperatively discover that the stem is well-fixed. As a result, you elect to perform the procedure shown in Figure B. Based on your intraoperative assessment what is the correct Vancouver classification and most common cause of reoperation given your surgical choice?