Outcome of operative treatment of metastatic fractures of the humerus: a systematic review of twenty three clinical studies

Purpose This systematic review aims to provide an overview of functional outcome and complications after surgery for metastatic humerus fractures. Methods A literature search was performed in September 2013 using the Pubmed, Embase and Cochrane database. We included 23 studies reporting on 29 treatment arms: intramedullary nailing (19 studies, 596 cases), plate-screw fixation (five studies, 150 cases), endoprosthetic reconstruction (three studies, 81 cases), and diaphysis prosthesis (two studies, 82 cases), totalling 909 fractures. There were 414 pathological and 56 impending fractures. In 439 cases the type of fracture was not specified. Four studies reported functional outcome. Results Average Musculoskeletal Tumor Society score ranged from 64 to 79 (three studies, 100 patients) after intramedullary nailing, was 90 (one study, 24 patients) after plate-screw fixation, and 73 (one study, 30 patients) after endoprosthetic reconstruction. Re-operation rate varied from 0 to 10 % after intramedullary nailing (overall 4.4 %), 5-14 % after plate-screw fixation (overall 9.3 %), 14-16 % after diaphysis prosthesis (overall 14.6 %), and 0-6 % after endoprosthetic reconstruction (overall 2.5 %). Systemic complication rate varied between 0 and 26 % after intramedullary nailing (overall 2.2 %), between 0 and 6 % after plate-screw fixation (overall 4.8 %), was 0 % after endoprosthetic reconstruction, and varied between 0 and 16 % after diaphysis prosthesis (overall 9.7 %). Conclusions Reported complication rates help surgeons inform their patients and could aid in surgical decision making. Functional outcome, pain and quality of life were poorly reported. Patient reported outcomes are therefore an important direction for future research.