So the J-sign is the lateral subluxation of the patella each time the patella goes into terminal extension. This patient was dislocating frequently. Investigation by MRI showed that he had …

"The J-sign on clinical examination is suggestive of patellar maltracking and potential instability." - [paper links to a video] Citation: Hadidi O, Ellanti P, Lincoln M, Hogan N. The J-sign in patellar …

Jul 13, 2005 · What does this mean "she has quite large J sign with active extension. The knee is clinically stable. Marked patellar subluxation laterally but joint space is fairly well maintained on …

2012 - Video of Dr Lars Blønd (Knee Surgeon) explaining the relationship of the J-sign to patellar instability Peer-reviewed paper - Journal interpretation - 2016 - First time patellar dislocation in …

As the patient straightens the knee, the patella suddenly shifts over the the lateral side. The event during knee examination is recorded as a positive 'J-sign' - a sudden swing of the patella to …

Classically with severe trochlear dysplasia the patient experiences there may be a visible subluxation near full extension, where the patella suddenly slips laterally. This is called the 'J …

Framing Patellar Instability: From Diagnosis to the Treatment of the First Episode Maggioni DM, Giorgino R, Messina C, Albano D, Peretti GM, Mangiavini L. Framing Patellar Instability: From …

There may also be a 'J-sign' where the abnormal excursion of the patella is visible when the patient holds the limb over the edge of the examination couch and flexes and contacts the knee.

J-sign search for term The J-sign is when the kneecap 'pops out' (subluxes) to the outer side each time the knee moves into the fully straight position (terminal extension). Page updated March …

The clinician may also be able to elicit a 'J-sign' as the knee goes into extension, when the patient lies on the coach with the leg over the side and actively bends and straightens the knee. …