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首页> 外文期刊>Skeletal radiology >Subchondral insufficiency fracture of the femoral head: histopathologic correlation with MRI.
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Subchondral insufficiency fracture of the femoral head: histopathologic correlation with MRI.

机译：股骨头软骨下功能不全骨折：MRI的组织病理学相关性。

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摘要

OBJECTIVE: To correlate the magnetic resonance imaging (MRI) features with the histopathologic findings in subchondral insufficiency fracture (SIF) of the femoral head. DESIGN AND PATIENTS: This study was based on a retrospective review of the MRI features and histopathologic findings in seven patients with SIF who had had total hip replacement. Results. In all seven cases, MRI showed a bone marrow edema pattern in the femoral head, and a focal low-intensity band beneath the articular cartilage on some slices (not all) on the T1-weighted images. The shape of the low-intensity band varied: it was irregular and serpentine in four cases, well-delineated, smooth, and a mirror image to the articular surface in two cases, and parallel to the articular surface in one case. On histologic examination, the low-intensity band on MRI corresponded to a fracture line and its associated repair tissue. In all but one case, the band was not visible on T2-weighted or fat suppression images, and the proximal subchondral portion of the lesion had a homogeneous high signal intensity. This region of high signal intensity corresponded histopathologically to viable bone and marrow tissue with associated callus, edema, and vascular granulation tissue. CONCLUSIONS: SIF of the femoral head characteristically demonstrates a low-intensity band on T1-weighted images that corresponds, histopathologically, to a linear subchondral fracture and its associated repair tissue. In most cases, the subchondral portion of the lesion appears on T2-weighted images as an area of homogeneously high signal intensity.
机译：目的：将磁共振成像（MRI）特征与股骨头软骨下功能不全骨折（SIF）的组织病理学发现相关联。设计和患者：本研究基于对7例全髋关节置换SIF患者的MRI特征和组织病理学研究的回顾性回顾。结果。在所有这七个病例中，MRI在T1加权图像上的某些切片（并非全部）上均显示了股骨头的骨髓水肿模式，以及在关节软骨下方的局灶性低强度带。低强度带的形状各不相同：4例为不规则和蛇形，2例为轮廓清晰，光滑且与关节面镜像，1例与关节面平行。在组织学检查中，MRI上的低强度带对应于骨折线及其相关的修复组织。除一种情况外，在T2加权或脂肪抑制图像上均看不到该条带，病变的近软骨下部分具有均一的高信号强度。高信号强度的该区域在组织病理学上对应于具有相关的愈伤组织，水肿和血管肉芽组织的可行的骨和骨髓组织。结论：股骨头的SIF在T1加权图像上表现出低强度带，在组织病理学上对应于线性软骨下骨折及其相关的修复组织。在大多数情况下，病变的软骨下部分在T2加权图像上显示为均一的高信号强度区域。

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