A cyclops lesion is a bunched up area of scar tissue in the notch of the femur.

A cyclops lesion can be a complication of anterior cruciate ligament surgery.


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.

An 'interpretation'of an article from 2000 describing the possible causes of loss of full extension in the knee after cruciate ligament reconstruction, how it is managed, and highlighting the importance of rehabilitation in preventing loss of full range of movement in the first place.