| 徐黎,屈辉.原发动脉瘤样骨囊肿的X线平片、CT和MRI表现与诊断价值[J].中国医学影像技术,2007,23(8):1224~1228 |
| 原发动脉瘤样骨囊肿的X线平片、CT和MRI表现与诊断价值 |
| Primary aneurysmal bone cyst: imaging features and diagnostic value of plain radiography, CT and MR |
| 投稿时间：2007-05-13 修订日期：2007-05-31 |
| DOI： |
| 中文关键词: 原发 动脉瘤样骨囊肿 放射线摄影术 计算机体层摄影术 磁共振成像 |
| 英文关键词:Primary Aneurysmal bone cyst Radiology Computed tomography Magnetic resonance imaging |
| 基金项目: |
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| 中文摘要: |
| 目的 探讨原发动脉瘤样骨囊肿的X线平片、CT和MR等不同影像学检查的征象,评价其诊断价值。方法 回顾性分析41例经手术病理证实的原发动脉瘤样骨囊肿的临床特点和影像学征象。影像学检查方法包括X线平片(n＝35)、CT(n＝23)和MR(n＝13)。结果 X线平片显示30例(86％)病变骨皮质膨胀形成骨包壳,其中17例(57％)骨皮质完整,但其中有5例在CT上显示骨包壳不完整;2例(6％)病灶内出现钙化;7例(20％)出现病理骨折,其中57％为脊柱病变。CT显示21例(91％)病变由大小和数量不等的囊腔构成,其中19例(90％)CT扫描出现液-液平面;4例(17％)病变内出现局部实性区域,其中1例为完全实性病变;3例病变侵犯了邻近关节和骨。MR检查发现12例(92％)出现液-液平面;囊间隔与囊壁厚薄不等、强化明显,T1WI显示不明显,T2WI为中高信号。结论 X线平片呈膨胀性溶骨改变,CT和MRI出现囊腔、液-液平面、强化明显的囊壁及囊间隔征象是诊断的重要依据。CT和MR在显示ABC特异征象方面具有独特优势。 |
| 英文摘要: |
| Objective To analyze the imaging features of primary aneurysmal bone cyst (ABC) and evaluate the diagnostic value of different imaging modalities including plain radiography, computed tomography (CT) and magnetic resonance (MR) imaging. Methods Forty-one cases with pathology confirmed primary aneurysmal bone cysts were retrospectively reviewed for clinical characteristics and imaging signs on plain radiography (n=35), CT (n=23) and MRI (n=13). Results On plain radiographies, cortex expansion presented in 30 cases (86%), shell of cortex were contiguous in 17 (57%) of the 30 cases, but 5 of which were uncontiguous on CT images; mineralization within the lesions in 2 cases (6%); pathologic fracture in 7 cases (20%), 57% of which were spinal lesions. On CT images, 21 cases (91%) were composed of cysts with different number and size; local solid elements within the lesions were found in 4 cases (17%) and 1 case was entire solid; fluid-fluid levels were seen in 19 cases (90%); invasion of adjacent joints and bones was observed in 3 lesions. On MR images, fluid-fluid levels were seen in 12 cases (92%); the internal septations and walls of the cysts were inhomogeneously enhanced markedly, these septations and walls were not evident on T1WI, but with medium to high signal on T2WI. Conclusion ABC is often presented as eccentrically expanded and lytic lesions on plain radiology. The cysts, fluid-fluid levels, walls and septations that were enhanced significantly are the important basis for the diagnosis of ABC. CT and MR have advantages in visualizing these diagnostic signs of ABC. |
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