To demonstrate the usefulness of dynamic US study with muscle contraction,
and typical radiological findings in patellar instability and patellofemoral pain syndrome. To perform a standardizedprocedure of ultrasound examination in patients with Patellofemoral pain syndrome (PFPS).
Patellofemoral pain syndrome (PFPS) is a frequent disease,
especially in young patients.
The cause of this syndrome has been linked to an abnormal lateral tracking of the patella and instability factors such as patellar trochlear dysplasia or patella Alta,
leading to joint incongruence and overload that causes cartilage deterioration and femoropatellar osteoarthritis.Therefore,
early diagnosis is essential,
though it remains difficult as it is based primarily on the clinical presentation and...
Findings and procedure details
Ultrasound is a method that allows the study of the peripatellar soft tissues and part of the trochlear groove,
its hyaline cartilage and its relationship with the patellar tip. T echnique of study: Patient lying in dorsal decubitus position,
with extension of both knees and feet in external rotation at 15 °,
with the US transducer placed axially on the thickest portion of the patellar tendon,
progressing cephalad until finding the tip of the patella (acousticshadow) that...
The US of the knee allows the dynamic assessment of the femoropatellar joint and does not use radiation.
It can be a complementary study in patients with symptoms of patellar instability.
The incorporation of study protocols with qualitative criteria (t rochlear dysplasia and hyaline cartilage thickness )and quantitative criteria (t rochlear cartilage angle and PTTG distance ) is considered of utmost importance.
Maria Florencia Salum Resident in training.
Department of Radiology,
Velez Sarsfield 562,
Argentina. Email: firstname.lastname@example.org Dr.
Manuel Albarenque Department of Osteoarticular Radiology,
Velez Sarsfield 562,
Argentina. Email: email@example.com Department of Osteoarticular Radiology,
Instituto Oulton: Dr.
Foa Torres Dr.
Martinez Residents in training: Dr.
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