Loredo R, Longo C, Salonen D, Yu J, Haghighi P, Trudell D, Clopton P, Resnick D
Department of Radiology, University of Texas at San Antonio, USA.
Radiology. 1995 Jul;196(1):33-41. doi: 10.1148/radiology.196.1.7784584.
To document the histopathologic basis of altered intralabral and sublabral signal intensity on magnetic resonance (MR) images.
Ten fresh cadaveric shoulder specimens underwent transaxial MR imaging with T1-weighted, proton-density-weighted, and T2-weighted spin-echo; multiplanar gradient-recalled echo (MPGR); three-dimensional Fourier transform gradient-recalled echo (GRE); spoiled gradient-recalled echo (SPGR); and T1-weighted, fat-suppressed sequences before and after intraarticular injection of gadolinium. Shoulders were then frozen and transversely sectioned, and histologic analysis of the labrum was performed.
Altered intralabral signal intensity correlated with fibrovascular tissue, mucoid or eosinophilic degeneration, calcification, ossification, synovial tissue, or combinations of these findings. A sublabral transitional band of intermediate signal intensity correlated with a transitional zone of fibrocartilage.
There are several causes of altered intralabral signal intensity. A transitional fibrocartilaginous zone correlates with sublabral increased signal intensity. Intraarticular administration of gadolinium improves evaluation of the glenoid labrum.
记录磁共振（MR）图像上盂唇内和盂唇下信号强度改变的组织病理学基础。
对10个新鲜尸体肩部标本进行横轴位MR成像，包括T1加权、质子密度加权和T2加权自旋回波序列；多平面梯度回波（MPGR）；三维傅里叶变换梯度回波（GRE）；扰相梯度回波（SPGR）；以及关节内注射钆对比剂前后的T1加权脂肪抑制序列。然后将肩部冷冻并横向切片，对盂唇进行组织学分析。
盂唇内信号强度改变与纤维血管组织、黏液样或嗜酸性变性、钙化、骨化、滑膜组织或这些表现的组合相关。盂唇下中等信号强度的过渡带与纤维软骨过渡区相关。
盂唇内信号强度改变有多种原因。纤维软骨过渡区与盂唇下信号强度增加相关。关节内注射钆对比剂可改善对盂唇的评估。
