An Impingement is when a structure in the body interferes with the mobility of another structure by getting in the way.

plica catching between bones - plica syndrome
A plica impinging between patella and femur.


Different kinds of impingement

There are a number of soft tissue structures that may become impinged, such as a bulky fat pad or a fattened and inflamed medial plica.


Pain syndromes related to the patella

A syndrome is a collection of signs and symptoms that tend to occur together.

A discussion about problems with regaining extension after ACL reconstruction because of a Cyclops Lesion.

ACL graft failure due to graft impingement

ACL reconstruction failure and revisions - Part 5b - by Dr Frank Noyes.

Conditions interfering with patellofemoral mechanics

Part 4a of a course on Patellofemoral Pain by Dr Ronald Grelsamer of Mount Sinai Hospital in New York.