摘要: |
目的:探讨超声造影(contrast-enhanced ultrasound,CEUS)对原发性腹膜后神经鞘瘤(primary retroperitoneal schwannoma,PRS)的诊断价值。方法:选择2013年1月至2018年11月经病理证实为PRS的14例患者,分析其常规超声及CEUS图像,观察病灶的增强方式和增强时相特点。结果:PRS多位于腹部中轴线近脊柱处,常规超声多表现为不均匀低回声、单发多见,边界清楚、形态规则,阻力指数平均为0.67。14例患者共14个病灶行CEUS,显示1个病灶不增强,余13个病灶均在增强早期快速增强,平均开始增强时间为(17.6±3.3) s,达峰时间为(30.9±6.1) s,开始减退时间为(42.9±9.8) s。肿瘤的增强方式包括弥散整体不均匀增强6例、分枝状整体增强5例、分隔增强2例、不增强1例;增强过程中,11个病灶内部出现始终不增强区。结论:PRS多位于腹部中轴线附近,常规超声表现为低回声,单发多见,阻力指数偏高,囊性变为其特点;CEUS上多表现为早期增强,可呈整体不均匀增强或分枝状整体增强,增强后期常出现不增强区。 |
关键词: 腹膜后 神经鞘瘤 超声造影 造影剂 |
DOI:10.12025/j.issn.1008-6358.2019.20190045 |
分类号:R 730.264 |
基金项目:上海市医学领军人才 |
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Diagnostic value of contrast-enhanced ultrasound in primary retroperitoneal schwannoma |
徐亚丹,武文卿,韩 红,闻捷先,季正标,王文平
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Abstract: |
Objective:To explore the value of contrast-enhanced ultrasound (CEUS) in the diagnosis of primary retroperitoneal schwannoma (PRS). Methods:The images of ultrasound and CEUS were retrospectively evaluated in 14 PRS patients who were confirmed by pathology from January 2013 to November 2018. The perfusion patterns and time of enhancement were observed according to conventional ultrasound and CEUS images. Results:PRS is mostly located at the central axis of abdomen near the spine, the conventional ultrasound performance of PRS was heterogeneous hypoechoic tumors, single lesion with clear boundary and regular shape, and the resistant index was 0.67. One lesion showed no enhancement and the other 13 lesions showed rapidly enhancement in the early period. The mean time of begin enhancement, time to peak and time to hypoechogenity was (17.6±3.3) s, (30.9±6.1) s, and (42.9±9.8) s, respectively. The enhancement type was divided into diffuse global heterogeneous enhancement (6 cases), branching global enhancement (5 cases), septal enhancement (2 cases), and non-enhancement (1 case). Non-enhancement area was found in 11 patients in the whole period. Conclusions:PRS is mostly located at the central axis of abdomen near the spine, and the conventional ultrasound shows hypoechoic lesion, most are single with high resistant index, and cysticity is important to the diagnosis of PRS. For most PRS, CEUS shows early enhancement with global heterogeneous enhancement or branching global enhancement, and non-enhancement area is usually found in the later enhancement. |
Key words: retroperitoneum schwannoma contrast-enhanced ultrasound contrast agent |