Complex joint reconstruction surgery is performed to restore joint stability, improve lost functionality, and relieve pain. Metastatic bone disease (MBD) is cancer that spreads to bone from other organs such as the lungs, breast, or prostate. Metastatic bone disease weakens and damages the bones causing bone fractures and pain. Surgery for MBD is performed to remove the tumor and fix the broken or weakened bone in place using instrumentation such as wires, plates, rods, pins, nails, or screws. In many cases, the defect caused by the tumor is filled with bone cement to provide additional strength.