The shiny-corner sign of the tibial plateau medial condyle: MRI appearances and clinical significance
1. Department of Radiology, Chinese Traditional Medicine Hospital of Danyang, Danyang Jiangsu 212300, China;
2. Department of Radiology, Nanjing General Hospital of Nanjing Military Command, Nanjing 210002, China
Abstract：Objective: To describe the MRI findings of the shiny-corner sign of the tibial plateau medial condyle and to analysis its association with the medial meniscal-osteochondral unit. Methods: Clinical data and MRI findings of 209 patients with 227 knees MRI exams were performed, from January to May 2014, were analyzed retrospectively. Results: Seventy knees demonstrated a shiny-corner sign and 51 cases involved the medial rim of the medial tibial plateau, 12 cases involved the posterior rim in and the anterior rim in 7 cases. Patients with shiny-corner sign were older than patients without shiny-corner sign(mean age (59.75±13.52) years vs (47.86±15.02) years). The presence of a shiny-corner sign could detect a tear of the medial meniscus with a sensitivity, specificity, positive predictive value, and negative predictive value of 61%, 91%, 83%, and 76%, respectively. The shiny-corner sign was associated with tears of the medial meniscus and radial displacement of the meniscus in the knee(P<0.001). Conclusion: Shiny-corner sign of the knee is associated with tears of the menisci and according to this we believe the concept that the menisci had the function to protect the underlying covered portions of the tibial plateau.
杨来华1，王 芬1，史涛涛1，刘建岭1，李建瑞2，孙志远2. 胫骨平台内侧髁亮角征的MRI表现及临床意义[J]. 中国临床医学影像杂志, 2016, 27(4): 282-284.
YANG Lai-hua1, WANG Fen1, SHI Tao-tao1, LIU Jian-ling1, LI Jian-rui2, SUN Zhi-yuan2. The shiny-corner sign of the tibial plateau medial condyle: MRI appearances and clinical significance. JOURNAL OF CHINA MEDICAL IMAGING, 2016, 27(4): 282-284.
[1]Deneweth JM, Newman KE, Sylvia SM, et al. Heterogeneity of tibial plateau cartilage in response to a physiological compressive strain rate[J]. J Orthop Res, 2013, 31(3): 370-375.
[2]Chang EY, Chen KC, Chung CB. The shiny corner of the knee: a sign of meniscal osteochondral unit dysfunction[J]. Skeletal Radiol, 2014, 43(10): 1403-1409.
[3]郭庆伟，刘筠，许亮，等. 膝骨性关节炎半月板周缘性移位的MRI研究及其临床意义[J]. 临床放射学杂志，2013，32（2）：242-245.
[4]Costa CR, Morrison WB, Carrino JA. Medial meniscus extrusion on knee MRI: is extent associated with severity of degeneration or type of tear?[J]. AJR, 2004, 183(1): 17-23.
[5]杨清华，王穗春，刘卫军，等. 磁共振T1WI-SPIR与关节镜诊断半月板撕裂的对比分析[J]. 中国CT和MRI杂志，2012，10（3）：77-79.
[6]Roemer FW, Neogi T, Nevitt MC, et al. Subchondral bone marrow lesions are highly associated with, and predict subchondral bone attrition longitudinally: the most study[J]. Osteoarthritis Cartilaqe, 2010, 18(1): 47-53.
[7]Yao L, Stanczak J, Boutin RD. Presumptive subarticular stress reactions of the knee: MRI detection and association with meniscal tear patterns[J]. Skeletal Radiol, 2004, 33(5): 260-264.
[8]Bergin D, Hochberg H, Zoga AC, et al. Indirect soft-tissue and osseous signs on knee MRI of surgically proven meniscal tears[J]. AJR, 2008, 191(1): 86-92.
