Analysis on MRI for the characteristics of the injuries of knee joint ligament and cartilage of pediatric patients after acute traumatic lateral patellar dislocation
10.3969/j.issn.1672-8270.2025.01.009
- VernacularTitle:磁共振成像对儿童急性创伤性髌骨外侧脱位后膝关节韧带及骨软骨损伤的特点分析
- Author:
Lei ZHANG
1
;
Chunsheng LIU
1
;
Zhiquan GUO
1
;
Yunli SHI
1
;
Xiaofang PENG
1
Author Information
1. 唐山市第二医院放射科 唐山 063000
- Publication Type:Journal Article
- Keywords:
Acute traumatic lateral patellar dislocation;
Magnetic resonance imaging (MRI);
Medial patellofemoral ligament (MPFL);
Cartilage injury;
Vastus medialis obliquus (VMO)
- From:
China Medical Equipment
2025;22(1):47-51
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To analyze the characteristics of the injury of knee ligament and cartilage in pediatric patients after acute traumatic lateral patellar dislocation based on magnetic resonance imaging (MRI). Methods:Clinical data of 68 pediatric patients with acute traumatic lateral patellar dislocation admitted to The Second Hospital of Tangshan from September,2020 to September,2023 were retrospectively analyzed. All children underwent MRI scan on knee joint. These children were divided into partial tear group (85 cases) and complete tear group (41 cases) according to injury degree. In addition,the location and characteristic of the medial patellofemoral ligament (MPFL) injury and cartilage injury were analyzed. Results:All 126 children had MPFL injury,including 85 cases of partial tear and 41 cases of complete tear. Among the partial tears,34 cases occurred only on the patellar side,14 cases only on the femoral side,9 cases only in the middle segment,and 28 cases had multiple-site injuries. Among the complete tears,27 cases occurred only on the patellar side,7 cases only on the femoral side,4 cases only in the middle segment,and 3 cases had multiple-site injuries. The number of each degree of partial MPFL injury was higher than that of complete injury,and the difference was statistically significant (x2=7.596,10.886,P<0.05). Among the 126 children,91 cases had VMO injury,and the degree of VMO injury was positively correlated with the degree of MPFL injury (r=0.339,P=0.006). Among the 126 children with acute traumatic lateral patellar dislocation,119 cases had osteochondral injury,with a total of 174 injured sites. The sites of grade 1 injury were mainly on the patellar side,while those of grades 2,3,and 4 injuries were mainly multiple-site injuries. Conclusion:Most of acute traumatic lateral patellar dislocation complicate MPFL injury and cartilage injury in pediatric patients,which mainly focus on patellar side of injury and multiple injury. There are no differences in injury site and degree between different genders. MPFL injury mostly complicates VMO injury,which injury degree is positively correlation with MPFL.
