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Research article

First published 2025-4

Anatomic Drivers of J-Sign Presence and Severity: If There Is a Jump,Look for a Bump

Navya Dandu, Mario Hevesi, Andrew R. Phillips [...]

The American Journal of Sports Medicine

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Research article

First published 2025-6

Anatomic Factors Influencing a Persistent J-Sign After Medial Patellofemoral Ligament Reconstruction and Distal Tibial Tubercle Osteotomy in Patients With Recurrent Patellar Dislocations and Patella Alta: A Retrospective Cohort Study

Raimundo Vial Irarrazaval, Stefan Turkula, Marc Tompkins [...]

The American Journal of Sports Medicine

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Research article

First published 2025-7

Outcomes After Isolated Medial Patellofemoral Ligament Reconstruction for Recurrent Patellar Instability: Influence of Persistent Postoperative Apprehension and J-Sign

Elizabeth R. Dennis, Brittany M. Ammerman, Joseph T. Nguyen [...]

The American Journal of Sports Medicine

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Research article

First published 2026

Isolated Medial Patellofemoral Ligament Reconstruction for Recurrent Patellar Dislocations With Increased Femoral Anteversion and an Absent/Mild J-sign

Zhijun Zhang, Daofeng Wang, Yang Liu [...]

The American Journal of Sports Medicine

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Research article

First published 2020-1

A High-Grade J Sign Is More Likely to Yield Higher Postoperative Patellar Laxity and Residual Maltracking in Patients With Recurrent Patellar Dislocation Treated With Derotational Distal Femoral Osteotomy

ZhiJun Zhang, Hui Zhang, GuanYang Song [...]

The American Journal of Sports Medicine

Open access

Abstract

First published 2021-10

Persistent J-Sign Following Distalization with Correction of Patellar Height: A Descriptive study reviewing anatomic factors (195)

Stefan Turkula, Andrew Schmiesing, Julie Agel [...]

Orthopaedic Journal of Sports Medicine

Open access

Abstract

First published 2022-7

Poster 233: The Presence of a Jumping J-Sign is Driven Primarily by Trochlear Factors and not Patella Alta or TT-TG Distance

Mario Hevesi, William Cregar, Athan Zavras [...]

Orthopaedic Journal of Sports Medicine

Open access

Research article

First published 2021-4

Clinical Outcomes and Prognostic Factors in Patients With Recurrent Patellar Lateral Dislocation Treated With Isolated Medial Patellofemoral Ligament Reconstruction: A Retrospective Single-Center Analysis

Zhidong Zhao, Yuxing Wang, Ji Li [...]

Orthopaedic Journal of Sports Medicine

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Research article

First published 2020-10-20

Conceptual design of an abnormality sign determination system for the general control system of the Materials and Life Science Experimental Facility at J-PARC

K. Sakai, M. Ooi, M. Teshigawara [...]

Journal of Neutron Research

Open access

Research article

First published 2025-9

Physical Examination for Patellofemoral Instability

Anthony J. Ignozzi, Matthew A. Oley, David R. Diduch

Video Journal of Sports Medicine

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