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Case Reports in Orthopedics
Volume 2013, Article ID 673576, 5 pages
http://dx.doi.org/10.1155/2013/673576
Case Report

A Massive Chondroblastoma in the Proximal Humerus Simulating Malignant Bone Tumors

1Department of Orthopedics, Institute of Health Biosciences, The University of Tokushima, Japan
2Department of Radiological Science, Institute of Health Biosciences, The University of Tokushima, Japan
3Department of Human Pathology, Institute of Health Biosciences, The University of Tokushima, Japan

Received 13 January 2013; Accepted 3 March 2013

Academic Editors: A. H. Kivioja and P. Kumar

Copyright © 2013 Ichiro Tonogai et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Chondroblastoma is a mostly benign bone neoplasm that typically affects the second decade of life and exhibits a lytic lesion in the epiphysis of long bones. We report an extreme case of massive, destructive chondroblastoma of the proximal humerus in a 9-year-old girl. It was difficult to differentiate using imaging information the lesion from malignant bone tumors such as osteosarcoma. Histopathological examination from biopsy proved chondroblastoma. The tumor was resected after preoperative transcatheter embolization. Reconstructive procedure for the proximal humerus was not performed due to the local destruction. The present case demonstrates clinical and radiological differentiations of the massive chondroblastoma from the other lesions and histopathological understandings for this lesion.