Beaujeux R, Wolfram-Gabel R, Kehrli P, Fabre M, Dietemann J L, Maitrot D, Bourjat P
Department of Radiology A, Hpitaux Universitaires de Strasbourg, France.
Spine (Phila Pa 1976). 1997 Jun 1;22(11):1264-8; discussion 1269. doi: 10.1097/00007632-199706010-00021.
A topographic and histologic study was done to describe the location of the lumbar epidural fat and to find potential tissular specificities.
To search for possible histologic characteristics of posterior lumbar epidural fat, which so far has been described as semifluid tissue, and to determine whether posterior lumbar epidural fat is not a simple incidental tissue.
The lumbar epidural fat on two fetuses was studied. In adults, subcutaneous fat and posterior lumbar epidural fat were taken from seven corpses. The authors obtained 13 posterior lumbar epidural fat pads (two at L1-L2, three at L2-L3, six at L3-L4, and two at L4-L5) and four subcutaneous fat pads.
The authors studied abdominal axial histologic sections in two fetuses, histologic multiplanar sections in seven adults, and semithin sections in four adults of posterior lumbar epidural fat and subcutaneous fat.
Fetal distribution of epidural fat was circumferential. Adult epidural fat distribution was limited to the posterior part of the vertebral canal and located at the disc level. Fascicles of connective tissue were less numerous and thinner in posterior lumbar epidural fat than in subcutaneous fat. Organized sliding spaces were found in the posterior epidural fat ped.
Posterior lumbar epidural fat is not a simple incidental tissue and shows specific histologic features: sliding spaces and rarefaction of connective tissue that could explain semifluid features of the tissue. These characteristics suggest a functional role of posterior epidural fat in the lumbar spinal unit.
进行了一项局部解剖学和组织学研究，以描述腰椎硬膜外脂肪的位置并寻找潜在的组织特异性。
探寻腰椎后硬膜外脂肪可能的组织学特征（迄今为止该脂肪被描述为半流体组织），并确定腰椎后硬膜外脂肪是否并非单纯的偶然组织。
对两个胎儿的腰椎硬膜外脂肪进行了研究。在成人中，从七具尸体获取了皮下脂肪和腰椎后硬膜外脂肪。作者获得了13个腰椎后硬膜外脂肪垫（L1-L2节段有2个，L2-L3节段有3个，L3-L4节段有6个，L4-L5节段有2个）和4个皮下脂肪垫。
作者研究了两个胎儿的腹部轴向组织学切片、七个成人的组织学多平面切片以及四个成人的腰椎后硬膜外脂肪和皮下脂肪的半薄切片。
胎儿硬膜外脂肪呈环形分布。成人硬膜外脂肪分布局限于椎管后部且位于椎间盘水平。腰椎后硬膜外脂肪中结缔组织束比皮下脂肪中的数量更少且更细。在后硬膜外脂肪 ped 中发现了有组织的滑动间隙。
腰椎后硬膜外脂肪并非单纯的偶然组织，具有特定的组织学特征：滑动间隙和结缔组织稀疏，这可以解释该组织的半流体特征。这些特征表明腰椎后硬膜外脂肪在腰椎脊柱单元中具有功能作用。
