12例长骨皮质旁骨肉瘤的影像学表现分析  

Imaging Features of Long Bone Parosteal Osteosarcoma with 12 Cases

作　　者：肖林[1] 胡剑波[1] 吴泽文[1] 谭敬安 

机构地区：[1]广州中医药大学附属骨伤科医院放射科,广东广州510240

出　　处：《中国CT和MRI杂志》2015年第2期73-76,共4页Chinese Journal of CT and MRI

摘　　要：目的分析长骨皮质旁骨肉瘤的临床及影像表现特征,以提高对该病诊断和鉴别诊断的能力。方法分析研究12例经手术病理证实的长骨皮质旁骨肉瘤的临床及影像学资料,其中发生在股骨近端2例,股骨远端8例,肱骨近端及胫骨近端各1例。结果长骨皮质旁骨肉瘤X表现为紧贴骨皮质的分叶状外生肿块,4例显示肿块与骨皮质间透亮线。CT表现为软组织肿块内见团状及菜花状不规则高密度瘤骨影。在MRI上,肿瘤T1WI加权呈低信号,T2WI加权呈高信号为主的混杂信号,T1WI增强扫描肿瘤的实性成分可见强化。CT、MRI均可显示肿瘤的软组织成分及对髓腔的侵犯,本组有4例髓腔受累,其中1例CT未显示。结论皮质旁骨肉瘤的影像学表现具有特征性,CT、MRI可清晰地显示肿瘤及其周围组织,对指导临床诊断与治疗具有重要的参考作用。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 .

关 键 词：皮质旁骨肉瘤 X线计算机体层成像 磁共振 

分 类 号：R738.1[医药卫生—肿瘤] R445.2[医药卫生—临床医学]