头颈部骨化性纤维瘤组织学亚型的 CT 和 MRI 影像学特征。
CT and MR imaging characteristics of histological subtypes of head and neck ossifying fibroma.
机构信息
1 Department of Radiology, Gifu University School of Medicine , Gifu , Japan.
2 Department of Pathology, Gifu University School of Medicine , Gifu , Japan.
出版信息
Dentomaxillofac Radiol. 2018 Jul;47(6):20180085. doi: 10.1259/dmfr.20180085. Epub 2018 Apr 11.
OBJECTIVES
The current study aimed to assess CT and MRI characteristics of histological subtypes of head and neck ossifying fibroma (OF).
METHODS
12 patients with histopathologically-proven head and neck OF were included in this study. Lesions were pathologically classified into three histological subtypes: eight cement-OFs (COFs), three juvenile psammomatoid OFs (JPOFs), and one juvenile trabecular OF (JTOF). All patients underwent CT examination, while seven also underwent MRI. Imaging characteristics were retrospectively assessed.
RESULTS
On CT images, the lesion margins were well-defined in nine patients (75%) (seven COFs and two JPOFs), partially ill-defined in two (17%) (one COF and one JTOF), and ill-defined in one (8%) (one JPOF). The continuity of the eroded overlying bone cortex was maintained in nine patients (75%) (seven COFs and two JPOFs) but disrupted in three (25%) (one COF, one JPOF, one JTOF). With respect to lesion density, homogeneous ground-glass opacity was observed in five patients (42%) (five COFs), target-like appearance in three (25%) (two COFs, one JPOF), and mixture of hyper- and hypodense areas were observed in four (33%) (one COF, two JPOFs, one JTOF). MR signal intensity was homogeneous in two patients (29%) (two COFs) and heterogeneous in five (71%) (two COFs, two JPOFs, one JTOF).
CONCLUSIONS
COFs tended to exhibit well-defined margins and preserved continuity of the overlying bone cortex. COFs were usually homogeneous, whereas JPOFs and JTOF were always heterogeneous. Target-like appearance was one of the characteristics of OFs, but it was observed in both COF and JPOF.
目的
本研究旨在评估头颈部骨化性纤维瘤（OF）组织学亚型的 CT 和 MRI 特征。
方法
本研究纳入了 12 例经组织病理学证实的头颈部 OF 患者。病变经病理分为三种组织学亚型：8 例骨化性纤维瘤（COF）、3 例青少年砂粒样 OF（JPOF）和 1 例青少年小梁状 OF（JTOF）。所有患者均行 CT 检查，7 例患者同时行 MRI 检查。回顾性评估影像学特征。
结果
在 CT 图像上，9 例（75%）患者的病变边界清晰（7 例 COF 和 2 例 JPOF），2 例（17%）病变边界部分清晰（1 例 COF 和 1 例 JTOF），1 例（8%）病变边界不清晰（1 例 JPOF）。9 例（75%）患者（7 例 COF 和 2 例 JPOF）受累骨皮质侵蚀的连续性得以维持，但 3 例（25%）患者（1 例 COF、1 例 JPOF 和 1 例 JTOF）连续性中断。就病变密度而言，5 例（42%）患者呈均匀磨玻璃样混浊（5 例 COF），3 例（25%）患者呈靶样外观（2 例 COF 和 1 例 JPOF），4 例（33%）患者呈混杂高、低信号（1 例 COF、2 例 JPOF 和 1 例 JTOF）。2 例（29%）患者（2 例 COF）MR 信号强度均匀，5 例（71%）患者（2 例 COF、2 例 JPOF 和 1 例 JTOF）信号强度不均匀。
结论
COF 倾向于表现出清晰的边界和受累骨皮质连续性的保存。COF 通常为均匀性，而 JPOF 和 JTOF 总是不均匀性。靶样外观是 OF 的特征之一，但在 COF 和 JPOF 中均可见。
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