Abstract: Objective To investigate the treatment effect of the extended type proximal humeral internal locking system (PHILOS) with proximal humeral and ipsilateral humeral shaft fractures.Methods From 2008 to 2010,9 patients with proximal humeral and ipsilateral humeral shaft fractures were treated with extended type PHILOS and followed.There were 5 men and 4 women,aged from 40 to 67 years (average 55.4 years).According to Neer classification,7 cases were two-part fractures,2 cases three-part fractures; According to AO classification,there were 5 cases of type A1,3 cases of type B1,1case of type C1.Postoperatively the shoulder functions were evaluated using Neer scoring system,Elbow functions were evaluated by the Mayo system.Results All patients were followed up for 14-36 months ( average 24 months),which showed fracture healing in all patients,There was no radial nerve palsy or other complications occurred.According to the Neer scoring system:4 were excellent,4 good,and 1 fair,and the excellent and good rate was 88.9%.According to the Mayo score system:8 were excellent,1good,and the excellent and good rate was 100%.Conclusion The treatment of proximal humeral and ipsilateral humeral shaft fractures with extended type PHILOS is good with the advantage of stable fixation,and less complications.

Key words: Proximal humerus, Humeral shaft, Fracture, Internal fixation, Locking plate