Gholamrezanezhad Ali, Basques Kyle, Kosmas Christos
Departments of Emergency Radiology and Musculoskeletal Imaging, Keck School of Medicine, University of Southern California (USC), 1520 San Pablo St, Los Angeles, CA 90033, USA.
Department of Radiology, Cleveland Medical Center, University Hospitals of Cleveland, Case Western Reserve University, Cleveland, OH, USA.
Clin Imaging. 2018 Sep-Oct;51:1-11. doi: 10.1016/j.clinimag.2018.01.009. Epub 2018 Feb 3.
Juxtacortical or surface tumors of bone are neoplasms arising from or just outside the cortex, and are composed of different histologic types. Although the imaging appearances of these lesions have similarities to their intramedullary counterparts, their location alters their radiographic and MR characteristics, creating difficulties in diagnosis. Meanwhile, several non-neoplastic lesions, such as stress reaction/stress fracture and indolent infectious processes, compound the differential diagnosis. Neoplastic juxtacortical lesions of bone have been classified into five categories: cartilaginous, fibrous, lipomatous, osseous, and metastatic tumors. Our goal in part one of this review is to illustrate the characteristic radiographic, CT and MR imaging features of various juxtacortical neoplasms, including pathognomonic imaging findings that can aid in diagnosis, and to develop an appropriate differential diagnosis for surface lesions based on imaging characteristics, lesion location and patient age.
骨皮质旁或骨表面肿瘤是起源于皮质或刚好位于皮质外的肿瘤，由不同的组织学类型组成。尽管这些病变的影像学表现与其髓内对应病变有相似之处，但其位置改变了它们的X线和磁共振特征，给诊断带来困难。同时，一些非肿瘤性病变，如应力反应/应力性骨折和隐匿性感染过程，使鉴别诊断更加复杂。骨皮质旁肿瘤性病变已被分为五类：软骨性、纤维性、脂肪性、骨性和转移性肿瘤。本综述第一部分的目的是阐述各种骨皮质旁肿瘤特征性的X线、CT和磁共振成像特征，包括有助于诊断的特征性影像学表现，并根据影像学特征、病变位置和患者年龄对表面病变进行适当的鉴别诊断。
