[Cyclops type changes--a specific complication after anterior cruciate reconstruction--a clinical and histopathologic study].

: Four cases of specific complication following 15 anterior cruciate ligament reconstructions using isometric vascularized patellar tendon tendon graft are presented. During "second-look" arthroscopy in all 4 cases a nodule in anterior knee compartment was found. The consistent microscopic finding within the nodule was the presence of disorganized dense fibroconnective tissue. Small bone debris were found in all cases. Arthroscopic debridement was performed resulting in proper joint function.