Yu S W, Sether L A, Ho P S, Wagner M, Haughton V M
Department of Radiology, Froedtert Memorial Lutheran Hospital, Medical College of Wisconsin, Milwaukee 53226.
AJNR Am J Neuroradiol. 1988 Mar-Apr;9(2):367-70.
Tears of the anulus fibrosus, which have been implicated in back pain, have not been studied systematically with MR imaging. We correlated MR images with cryomicrotome sections to study the lumbar anulus fibrosus in 20 cadavers. Three distinct types of tears of the anulus were identified: concentric tears, characterized by fluid-filled spaces between adjacent lamellae; radial tears, characterized by a rupture of all layers in the anulus between the nucleus and the surface of the disk; and transverse tears, characterized by a rupture of Sharpey's fibers in the periphery of the anulus, near the ring apophysis. In each type, fluid or mucoid material was present in the tear. MR demonstrated the transverse and radial tears. We conclude that MR imaging provides an accurate means for investigating tears of the anulus.
纤维环撕裂与背痛有关，但尚未通过磁共振成像（MR）进行系统研究。我们将MR图像与冷冻切片进行对比，以研究20具尸体的腰椎纤维环。我们识别出三种不同类型的纤维环撕裂：同心撕裂，其特征为相邻板层之间存在充满液体的间隙；放射状撕裂，其特征为椎间盘髓核与表面之间的纤维环所有层均发生破裂；横向撕裂，其特征为在靠近环状突的纤维环周边，夏皮氏纤维发生破裂。在每种类型的撕裂中，撕裂处均存在液体或黏液样物质。MR显示了横向和放射状撕裂。我们得出结论，MR成像为研究纤维环撕裂提供了一种准确的方法。
