%0 Journal Article %T A Massive Chondroblastoma in the Proximal Humerus Simulating Malignant Bone Tumors %A Ichiro Tonogai %A Mitsuhiko Takahashi %A Hiroaki Manabe %A Toshihiko Nishisho %J Case Reports in Orthopedics %D 2013 %I Hindawi Publishing Corporation %R 10.1155/2013/673576 %U http://dx.doi.org/10.1155/2013/673576