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The suprapatellar recess is an extension of the knee synovial cavity above the patella, deep to the quadriceps tendon. Its communication with the joint explains why joint fluid can accumulate superior to the patella. It differs from the superficial prepatellar bursa.

The tibial collateral ligament is the medial supporting ligament of the knee, connecting femur and tibia. It helps resist medial opening under valgus loading and has close relations to the medial meniscus. Those attachments differ from the more separate lateral collateral arrangement.