Head and Neck Imaging
Imaging Features of Long Bone Parosteal Osteosarcoma with 12 Cases
Author：XIAO Lin, HU Jian-bo, WU Ze-wen, TAN Jing-an
affiliation：Guangzhou University of Traditional Chinese Medicine Orthopaedic Hospital Department of Radiology, Guangdong Guangzhou 510240, China
PDFAbstract
Objective To investigate the imaging features of long bone parotsteal osteosarcoma. Methods The clinical data and images of 12 patients with long bone parotsteal osteosarcoma confirmed operatively were reviewed. 2 cases occurred in proximal femur, 8 cases occurred in distal femur，and 1 case occurred in proximal humerus and tibia. Results 12 cases of long bone parosteal osteosarcoma showed lobulated and exophytic mass attached to the underlying cortex on X-ray. A radiolucent line between the tumor and the normal cortex was noticed in 4 cases. CT scan demonstrated soft tissue mass with focal or cauliflower-like high density tumor bone in it. The lesions appeared as low signal intensity on T1WI and mixed mainly high signal intensity on T2WI. The signal density of the solid component in tumor was increased after gadolinium was injected. Both CT and MRI showed solid component in tumor and the marrow involvement. The marrow was involved in 4 cases, one was missed in CT finding. Conclusion There were characteristic imaging manifestations of the neoplasm. CT and MRI can clearly show the neoplasm and its surrounding tissues, and it's an improtant reference in the diagnosis and surgical treatment .
【Keyword】Long Bone; Parosteal Osteosarcoma; Computed Tomography; Magnetic Resonance Imaging
【Chart number】R738.1；R445.2；R445.3
【Document Identification Number】A
【DOI】 10.3969/j.issn.1672-5131.2015.02.24
Chinese journal of CT and MRI
th13Volume， th 2 Issue
2015Year02Month
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