Blazina et al first used the term jumper's knee in 1973 to describe an insertional tendinopathy seen in skeletally mature athletes. Jumper's knee usually affects the attachment of the patellar tendon to the inferior patellar pole. The definition was subsequently widened to include tendinopathy of the attachment of the quadriceps...

Edward T. Habermann, MD, Lester S. Borden, MD, FACS Anthony K. Hedley, MD, FRCS, David S. Hungerford, MD Kenneth A. Krackow, MD
Abstract: This retrospective study reviewed the results of 3,218 total knee arthroplasty cases using one total knee replacement system at five centers from July 1991 to October 1997....

The patellar tendon ruptures relatively infrequently. However, the complications of an untreated rupture to the extensor mechanism can be extremely disabling. Surgical intervention allows for excellent recovery of motion and strength, provided that the injury is diagnosed in a timely fashion and repaired immediately. The focus of this article is...

See:
- Rupture of the Quadriceps:
- Patellar Tendon Injury:
- Tibial Tubercle Frx:
- Discussion:
- extensor mechanism includes quadriceps, quadriceps tendon, medial & lateral ...

VCU Health System Pediatric Radiology Case of the Week
Disease Images, diagnosis, Treatment options
Pain, swelling, tenderness of inferior patellar pole at origin of the patellar tendon
Osteochondrosis involving the apex of the patella 10-14 years
Traction phenomenon - tendonitis proximal patellar tendon
Calcification and ossification on elongated inferior patellar pole
Natural...

- usually occur in pts under age of 40;
- most ruptures occur w/ the knee in a flexed position (around 60 deg) which are then subject to excessive loading;
- great majority occur at level of inferior patellar pole (> level of tibial...

Soft tissue injuries of the knee are some of the most common and clinically challenging musculoskeletal disorders in patients presenting to the ED. Therefore, establishing clear-cut diagnostic and therapeutic objectives for these injuries is important. Knee pain and related symptoms may derive from damage to 1 or more of the soft...

- cause of discomfort in anterior aspect of the knee;
- caused by persistent traction at the cartilaginous junction of patella & patellar ligament, usually at inferior patellar pole;
- usually seen in an active preteen boy who complains of activity-related pain;
...

patellar dislocation

Patellar Dislocations, The Alfred I. duPont Institute

- inflammation of patellar tendon second to repetive trauma (jumping sports);
- seen in athletes involved in running, jumping, and kicking sports;
- Occurs usually in skeletally mature adults, Age range 16 to 40 years, males slightly> females
...

Isolated fracture of the lateral condyle of the femur or Hoffa fracture is a rare lesion and has been reported to occur with supracondylar fracture of the femur, fracture of the femoral shaft and knee dislocation. We report a rare case of ipsilateral Hoffa fracture and patellar dislocation, which has...

11 cm lengthening of patellar tendon and complete restoring of the quadriceps mechanism by using Ilizarov technique after neglected fracture of the patella (Amman 2003)

Several primary types of patellar fractures have been identified, each with separate diagnostic, imaging, and management considerations. The primary types include transverse, vertical, marginal, and osteochondral fractures.
keywords - broken kneecap, broken patella, broken knee, kneecap fractures, knee fracture
Christine Lamoureux, MD 2007

Notes and Illustrations
Children and adolescents 10-14 years
Knee pain aggravated by activity
Tenderness and soft tissue swelling over the inferior pole of the patella.
Probably traumatic (traction injury) origin
Closely related to Osgood-Schlatters
Tendinitis, followed by calcification or ossification.
X-ray - osseous fragmentation at lower pole patella
NOT an apophysitis...

In the 1800s, treatment of patella fractures was quite controversial. Owing to lack of adequate fixation techniques, surgical experience, and imaging, treatment most often was extension splinting. This led to poor results because of intra-articular incongruity, nonunion, and poor motion. Initial attempts at operative stabilization of these fractures yielded rates...

Provides a presentation of knee fusion, patellar resurfacing, patellar complications and knee rehabilitation. Reviews the characteristics of the forces which are transmitted across the knee during its normal use in performing the activities of daily living. Johns Hopkins University.

- PreOp Planning:
- radiographs and templating:
- Surgical Exposure:
- Patient Positioning, Preping, Draping:
- Anterior Longitudinal Midline Approach:
- Medial and Lateral Capsular Exposure:
- Patellar Eversion: patellar resurfacing:
Wheeless' Textbook of Orthopaedics

Sinding-Larsen-Johansson syndrome is inflammation of the kneecap (patella) at its lowest point. This is the site of origin of the patellar tendon. There is traction on the kneecap at this point due to action of the large, powerful thigh muscle (quadriceps), as well as with deep bending of the knee....

We report the design of a surgical instrument that facilitates the harvest of the autologous patellar tendon in anterior cruciate ligament (ACL) reconstruction. The advantage of this jig is that it is a simple, self-centring device resulting in a reproducible and consistent autograft. Its use also minimises the potential risks...

- Anatomy
- Biomechanics
- Classification of Patellar Fractures
- Osteochondral Frx
- Pediatric Patellar Avulsion Fractures

Archive Copy 2004

- synovial plica are folds of embryonic remnants of synovial membrane which, in fetus, divide knee is divided into medial, lateral, & patellar compartments;
- although these membranes normally degenerate by the second trimester, ...

Ruptures of the quadriceps tendon occur relatively infrequently and usually occur in patients older than 40 years. A strong association exists with numerous systemic diseases and prior degenerative changes in the knee extensor mechanism. Ruptures most often occur unilaterally. Bilateral ruptures are highly correlated with systemic disease but have been...