Patella alta - high riding patella

Case contributed by Dr Fakhry Mahmoud Ebouda

Presentation

Persistent anterior knee pain since long time.

Patient Data

Age: 22 years.
Gender: Male
X-ray

The patella is seen higher in position (high riding).

Abnormally high position of the patella that is denoting high riding patella.

Abnormal patellar tendon L / greatest diagonal L of patella = 1.65 = suggesting patella alta. (ratio must not exceed 1.2). Evidence of retro and infrapatellar soft tissue edema pattern is seen.

Moderate amount of synovial joint effusion.

 

MRI

Annotated image

An annotated image to demonstarte Insall-Salvati ratio which is abnormal denoting high riding patella.

Case Discussion

The case is considered as idiopathic high riding patella as confirmed by Insall-Salvati ratio.

 

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Case information

rID: 32905
Case created: 20th Dec 2014
Last edited: 27th Nov 2015
Inclusion in quiz mode: Included

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