Fat pad impingement syndromes of the knee

Dr Henry Knipe et al.

In fat-pad impingement syndromes the aetiologies are different for each knee fat pad.

In anterior suprapatellar fat pad impingment syndrome the cause is usually due to either a developmental cause related to the anatomy of the extensor mechanism, or may be related to abnormal mechanics. In this syndrome the posterior border of the fat pad is convex with mass effect upon the suprapatellar recess.

In infrapatellar fat pad impingement syndrome (Hoffa disease) the cause is usually due to single or repetitive traumatic episodes; the inflamed fat pad then becomes hypertrophied with predisposition to impingement between the tibia and femur, and thus to further injury (a vicious circle).

Knee pathology

The knee is a complex synovial joint that can be affected by a range of pathologies:

Share article

Article Information

rID: 23377
Section: Pathology
Tags: knee, refs, cases
Synonyms or Alternate Spellings:

Support Radiopaedia and see fewer ads

Cases and Figures

  • Drag
    Case 1: suprapatellar fat pad impingement syndrome
    Drag here to reorder.
  • Updating… Please wait.

    Alert accept

    Error Unable to process the form. Check for errors and try again.

    Alert accept Thank you for updating your details.