Low Field MRI Findings of the Morel-Lavallée Lesions in the Soft Tissue of the Limbs
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摘要: 目的:分析肢体软组织Morel-Lavallée损伤的低场MRI表现。方法:回顾性分析临床证实的29例软组织Morel-Lavallée损伤的0.35T MRI资料。结果:29例35个病变,主要累及部位(例数):膝关节周围(n=12),盆部及大腿上段(n=10),小腿(n=4),上臂(n=2)及前臂(n=1)。位于皮下深层脂肪与深筋膜之间。病灶(个数,n=35)可呈椭圆形(n=5)、梭形(n=11)或新月形(n=19),可无包膜(n=21)、有部分包膜(n=10)或完整包膜(n=4),部分可见分隔(n=9)。由于病灶内部纤维组织和(或)血液等成分及含量的不同,病灶表现为多种信号特征:急性期及亚急性期病例(n=3)多以血性成分为主(MRI呈T1WI及T2WI高信号为主),慢性期(n=26)以液性信号为主(MRI呈T1WI低及T2WI高信号为主)。部分病灶内部可见条状、小结节状、条片状脂肪信号影(n=23),部分可见液液平及脂液平(n=10)。结论:MRI是评价肢体软组织Morel-Lavallée损伤重要的无创伤检查方法。
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关键词:
- 肢体 /
- 软组织损伤 /
- 脱套伤 /
- Morel-Lavallée损伤 /
- 磁共振成像
Abstract: Objective: To analyze the low field MRI findings of the Morel-Lavallée Lesions in the limb soft tissue. Methods: A retrospective analysis of 0.35 T MRI data of 29 cases with the Morel-Lavallée Lesions confirmed clinicly in the limb soft tissue.Results:29 patients with 35 lesions, mainly involving locations(cases): around the knee joint(n = 12), pelvis and upper leg(n = 10), crus(n = 4), upper arm(n = 2) and forearm(n = 1). The lesions(numbers, n = 35) were located between deep subcutaneous fat and deep fascia, with oval(n = 5), fusiform(n = 11) or crescentic(n = 19) and may have tapering margins that fuse with adjacent fascial planes. The lesions were well defined with no capsule(n = 21), a portion of the capsule(n = 10) or complete capsule(n = 4), partially with separation(n = 9). The lesions may be characterized by a variety of signal features due to the internal composition and content of the fibrous tissue and/or blood: in the acute and subacute phase(n = 3), the lesions mainly composed of bloody component(MRI showed high T1WI and high T2WI signal), in the chronic phase(n = 26), the lesions mainly composed of liquid(MRI showed low T1WI and high T2WI signal). The strip, small article or flake fat signals may be seen within the lesions(n = 23), partly with liquid-liquid flat and fat-liquid flat(n = 10). Conclusion: MRI is a important non-invasive examination method to evaluate the Morel-Lavallée Lesions of the limb soft tissue. -
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