The infrapatellar fat pad or Hoffa fat pad is the main fat pad of the knee, but there are other fat pads also above the patella.
Symptoms relating to fat pad syndrome
Symptoms include pain in the front of the knee which is generally chronic (long standing), and with sharper episodes exacerbated by knee extension, eg straight leg raise exercises or hyperextension, eg kicking or wearing high heels.
The soft tissue under the kneecap is tender to palpation, and the bottom of the kneecap may be tilted backwards by contracted scar tissue in the fat pad.
Causes of fat pad syndrome
The condition may occur after direct trauma to the knee, or after surgical interference with the fat pad.
"...has been defined as the impingement of Hoffa’s fat pad, occurring with concomitant pathology, leading to its oedema and fibrosis....can also be caused by repetitive micro trauma resulting in inflammation and fibrous changes to Hoffa’s fat pad"
Other relevant links
IPP-Fat pad complex, Ligamentum mucosum, Hoffa's disease, Hoffa's syndrome, Hoffa's sign
Forum discussions
- UK Surgeons for arthrofibrosis/ Hoffa fat pad - Patient looking for a surgeon to deal with fat pad issues.