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<!doctype html> <html lang="en"> <head> <title>Demystifying Tibial-Tuberosity Trochlear Groove Distance, th | 31181</title> <meta name="keywords" content="Meena GL, Md Razak K, Gupta S , J sign; Trochlea; Dysplasia; (TTTG) Tibial tuberosity trochlear groove"/> <meta name="description" content="Aims and objective: The purpose of our study was to examine the association of the clinical J-sign with trochlear dysplasia and TTTG distance in patients w..31181"/> <meta name="citation_publisher" content="Longdom Publishing SL" /> <meta name="citation_journal_title" content="Journal of Medical Diagnostic Methods"> <meta name="citation_title" content="Demystifying Tibial-Tuberosity Trochlear Groove Distance, the J-Sign and Trochlear Dysplasia: An Imaging Encomium"> <meta name="citation_author" content="Meena GL" /> <meta name="citation_author" content="Md Razak K" /> <meta name="citation_author" content="Gupta S" /> <meta name="citation_year" content="2017"> <meta name="citation_volume" content="6"> <meta name="citation_issue" content="3"> <meta name="citation_doi" content="10.4172/2168-9784.1000251"> <meta name="citation_issn" content="2168-9784"> <meta name="citation_online_date" content="2019/06/28" /> <meta name="citation_firstpage" content="1"> <meta name="citation_lastpage" content="3"> <meta name="citation_abstract" content="Aims and objective: The purpose of our study was to examine the association of the clinical J-sign with trochlear dysplasia and TTTG distance in patients with symptomatic patellofemoral instability. Material and methods: After obtaining approval from the institutional review board (class: 8.1-16/47-2, Nr.: 02/21AG, April 11, 2017), in our retrospective cross-sectional review study, 2 raters mutually assessed the type of trochlear dysplasia and separately measured the TTTG distance at 4-week intervals using 2 methods (standard and by Nizi#) on static and dynamic CT-images of 55 knees (46 patients) with clinical record of J-sign and anterior knee pain. Statistical analysis: All reported P values were 2-tailed with a level of <0.05 indicating statistical significance. The associations between variables were analyzed with appropriate correlation coefficients (Pearson, rp, pointbiserial, rpb, and phi, r#). The Wilcoxon signed-rank test for paired samples was used to evaluate the differences between static and dynamic tibial tuberosity-trochlear groove. Conclusion: The clinical manifestation of the J-sign, considered a dynamic marker of patellofemoral instability, has been frequently associated with numerous conditions, such as trochlear dysplasia, higher values of the Q-angle, and lateralized tibial tuberosity, yet its fundamental cause remains unknown, and the diagnostic value uncertain. 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dysplasia and TTTG distance in patients with symptomatic patellofemoral instability.</p> <p><strong>Material and methods:</strong> After obtaining approval from the institutional review board (class: 8.1-16/47-2, Nr.: 02/21AG, April 11, 2017), in our retrospective cross-sectional review study, 2 raters mutually assessed the type of trochlear dysplasia and separately measured the TTTG distance at 4-week intervals using 2 methods (standard and by Nizi#) on static and dynamic CT-images of 55 knees (46 patients) with clinical record of J-sign and anterior knee pain.</p> <p><strong>Statistical analysis:</strong> All reported P values were 2-tailed with a level of <0.05 indicating statistical significance. The associations between variables were analyzed with appropriate correlation coefficients (Pearson, rp, pointbiserial, rpb, and phi, r#). The Wilcoxon signed-rank test for paired samples was used to evaluate the differences between static and dynamic tibial tuberosity-trochlear groove.</p> <p><strong>Conclusion:</strong> The clinical manifestation of the J-sign, considered a dynamic marker of patellofemoral instability, has been frequently associated with numerous conditions, such as trochlear dysplasia, higher values of the Q-angle, and lateralized tibial tuberosity, yet its fundamental cause remains unknown, and the diagnostic value uncertain.</p> </p> <p class="mb-1 font-size-3 text-muted"> </p> <nav class="nav a-pl-0"> <a href="https://www.longdom.org/open-access/demystifying-tibialtuberosity-trochlear-groove-distance-the-jsign-and-trochlear-dysplasia-an-imaging-encomium-31181.html" title="Click here" class="nav-link text-danger"><img src="/assets/img/html.svg" alt="html" height="26"></a> <a 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