الفهرس 
Shoulder arthroplasty as a reconstructive option after resection of proximal humerus tumors
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Abstract
The proximal humerus is not uncommon site for both primary chondrosarcomas and osteosarcomas and. Metastatic tumors occasionally involve the shoulder girdle especially of renal cell origin. (1) Several types of resections are available for tumors of the Shoulder girdle.The type of resection has a major influence on the choice of reconstruction. According to Malawer classifications there are 6 types in shoulder girdle resection type 1 is intraarticular proximal humerus resection and type 5 is extra articular humerus and glenoid resections, other types are concerned with the scapula. (2) The shoulder joint has a unique characteristic due to the presences of rotator cuff muscle so complete resection of them , as a part of enbloc tumor resection, causes severe impairment of function, resulting in a pseudo-paralytic condition where the arm cannot be actively lifted away from the body. (3) Allograft prosthesis composites Osteoarticular allografts and prostheses are among the most commonly used techniques for the surgical treatment of proximal humerus tumors. (4) The optimal reconstructive technique after proximal humerus resection is debatable with several literatures comparing the outcome, complications and survival of different forms of surgical reconstructions after proximal humeral tumor resection (5) We are aiming at showing the results of endoprosthetic reconstruction after proximal humeral resection and its functional results when compared to other biological methods. Reconstruction of the proximal humerus after tumor resection is a surgical challenge