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Infrapatellar fat pad syndrome, also known as Hoffa's disease, is when pain in the front of the knee occurs due to problems with the infrapatellar fat pad. [2] Pain is generally just below the kneecap. [2] Symptoms may worsen if the knee is overly straightened or bent for too long a period. [2]
When the deep bursa is involved, bending the knee generally increases the pain. [2] Other conditions that may appear similar include patellar tendonitis and prepatellar bursitis. [5] Treatment is generally by rest, alternating between ice and heat, and NSAIDs. [1] Infrapatellar bursitis is relatively rare. [4]
the deep infrapatellar bursa between the upper part of the tibia and the patellar ligament. [2] It allows for movement of the patellar ligament over the tibia. [4] the subcutaneous (or superficial) infrapatellar bursa between the patellar ligament and skin. [2] the pretibial bursa between the tibial tuberosity and the skin. [2]
Tenderness in the tibial tuberosity can arise from Osgood-Schlatter disease or deep infrapatellar bursitis.A bony prominence on the tibial tuberosity can be the result of ongoing Osgood-Schlatter’s irritation in an adolescent with open growth plates, or what remains of Osgood-Schlatter’s in adults.
The suprapatellar bursa is prevented from being pinched during extension by the articularis genus muscle. [4] On the tibia, the anterior reflection and attachment of the synovial membrane is located near the cartilage. [2] Anteriorly, the infrapatellar fat pad is inserted below the patella and between the two membranes.
The infrapatellar fat pad (Hoffa's fat pad) is a cylindrical piece of fat that is situated inferior and posterior to the patella bone within the knee, [1] intervening between the patellar ligament and synovial fold of the knee joint.
The diagnosis of patellofemoral pain syndrome is made by ruling out patellar tendinitis, prepatellar bursitis, plica syndrome, Sinding-Larsen and Johansson syndrome, and Osgood–Schlatter disease. [23] Currently, there is not a gold standard assessment to diagnose PFPS. [20]
X-ray of the knee of a 12-year-old male, showing knee effusion of medium severity, marked by black arrows. It displaces the patella anteriorly and extends into the suprapatellar bursa. An X-ray is useful to verify that there is no break or dislocation when there is a history of trauma. May show signs of osteoarthritis.