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Abstract：
Chondroblastomas are a primary benign cartilaginous tumor that accounts for approximately 1% of all benign bone tumors. Primarily they are treated by curettage. The patient presented 4 years after a successfully treated chondroblastoma (curettage and Bone cement). Wide resection of the proximal tibia with endoprosthesis replacement was done. Lung CT showed multiple lung metastasis and despite starting chemotherapy, he succumbed to the disease. We discuss regarding the possibilities of \"aggressive\" chondroblastoma and more recently termed chondroblastoma-like osteosarcoma which is a separate entity from chondroblastoma. Aggressiveness in chondroblastoma can be 1 of 3 types as follows: 1. benign chondroblastoma with lung metastasis. 2. malignant chondroblastoma. 3. subsequent malignant transformation of benign chondroblastoma. We have attempted to review the literature and describe the \"aggressive\" chondroblastoma and chondroblastoma-like osteosarcoma in this report.
摘要：
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