Kim Youdong, Ha Doo Hoe, Lee Sang Min
Department of Radiology, CHA Bundang Medical Center, CHA University, Seongnam, Korea.
Ultrasonography. 2017 Oct;36(4):363-369. doi: 10.14366/usg.17007. Epub 2017 Apr 5.
The purpose of this study was to evaluate the ultrasonographic findings associated with posterior interosseous nerve (PIN) syndrome.
Approval from the Institutional Review Board was obtained. A retrospective review of 908 patients' sonographic images of the upper extremity from January 2001 to October 2010 revealed 10 patients suspicious for a PIN abnormality (7 male and 3 female patients; mean age of 51.8±13.1 years; age range, 32 to 79 years). The ultrasonographic findings of PIN syndrome, including changes in the PIN and adjacent secondary changes, were evaluated. The anteroposterior diameter of the pathologic PIN was measured in eight patients and the anteroposterior diameter of the contralateral asymptomatic PIN was measured in six patients, all at the level immediately proximal to the proximal supinator border. The size of the pathologic nerves and contralateral asymptomatic nerves was compared using the Mann-Whitney U test.
Swelling of the PIN proximal to the supinator canal by compression at the arcade of Fröhse was observed in four cases. Swelling of the PIN distal to the supinator canal was observed in one case. Loss of the perineural fat plane in the supinator canal was observed in one case. Four soft tissue masses were noted. Secondary denervation atrophy of the supinator and extensor muscles was observed in two cases. The mean anteroposterior diameter of the pathologic nerves (n=8, 1.79±0.43 mm) was significantly larger than that of the contralateral asymptomatic nerves (n=6, 1.02±0.22 mm) (P=0.003).
Ultrasonography provides high-resolution images of the PIN and helps to diagnose PIN syndrome through visualization of its various causes and adjacent secondary changes.
本研究旨在评估与骨间后神经（PIN）综合征相关的超声检查结果。
获得了机构审查委员会的批准。对2001年1月至2010年10月期间908例患者上肢的超声图像进行回顾性分析，发现10例患者疑似PIN异常（7例男性和3例女性患者；平均年龄51.8±13.1岁；年龄范围32至79岁）。评估了PIN综合征的超声检查结果，包括PIN的变化和相邻的继发性变化。在8例患者中测量了病理性PIN的前后径，在6例患者中测量了对侧无症状PIN的前后径，均在旋后肌近端边界近端紧邻的水平进行测量。使用Mann-Whitney U检验比较病理性神经和对侧无症状神经的大小。
4例观察到在弗罗伊泽弓处受压导致旋后肌管近端的PIN肿胀。1例观察到旋后肌管远端的PIN肿胀。1例观察到旋后肌管内神经周围脂肪平面消失。发现4个软组织肿块。2例观察到旋后肌和伸肌的继发性失神经萎缩。病理性神经的平均前后径（n = 8，1.79±0.43 mm）明显大于对侧无症状神经的平均前后径（n = 6，1.02±0.22 mm）（P = 0.003）。
超声检查可提供PIN的高分辨率图像，并通过可视化其各种病因和相邻的继发性变化有助于诊断PIN综合征。
