Fig. 2
From: Pathological mechanisms and therapeutic outlooks for arthrofibrosis
a Sagittal fast spin echo intermediate-weighted image of a 33-year-old woman with clinical stiffness following anterior cruciate ligament (ACL) reconstruction, showing scarring of the synovium around the ACL reconstruction (long arrow) as well as the central portion of the deep infrapatellar fat pad (short arrow) and the lining of the suprapatellar recess (oval). b Magnetic resonance imaging of the knee of a 49-year-old male with clinical stiffness 2 months following a meniscus operation, showing deep infrapatellar fat pad scarring (long arrow) and shortening of the patella tendon (short arrow) with resultant patella infera (abnormally low lying patella)
