Infrapatellar Bursa

bursa infrapatellaris

The deep infrapatellar bursa lies between the posterior surface of the patellar tendon and the anterior tibia (fat pad level), while the superficial infrapatellar bursa lies between the skin and the distal patellar tendon and tibial tuberosity. The deep bursa reduces friction between the tendon and the Hoffa fat pad during knee extension movements.

Region: Knee

Clinical Relevance

Clinical Notes

Deep infrapatellar bursitis produces pain and fullness beneath the patellar tendon, reproduced by resisted knee extension and palpation deep to the distal patellar tendon. It may be confused with Hoffa fat pad impingement, which is lateral to the patellar tendon. Superficial infrapatellar bursitis (clergyman's knee) from kneeling on hard surfaces produces visible swelling over the tibial tuberosity. Ultrasound-guided injection targets the deep bursa specifically. Chronic cases may require endoscopic bursectomy.

Pathology

Common Injuries & Conditions

Infrapatellar Bursitis

Swelling and pain inferior to the patella from repetitive friction — superficial from kneeling (clergyman's knee) or deep from impingement between the tendon and fat pad.