Chondromalacia patellae
The term chondromalacia patellae refers to a degenerative condition of the articular surface of the patella that progresses from softening, through fibrillar changes and full-thickness cracks, to exposed subchondral bone.
It is graded from I to IV, according to the Outerbridge classification system.
Differential diagnosis:
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Chondromalacia patellae |
Symptomatic plica of the knee |
|
Patellar malalignment |
Fat pad syndrome (Hoffa’s disease) |
|
Patellar tracking abnormality |
Bursitis, infrapatellar/prepatellar |
|
Tendinitis quadriceps/patellae |
Pes anserine bursitis |
|
Tight iliotibial band |
Retinacular neuroma |
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Meniscal pathology |
Tight lateral retinaculum |
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Painful bipartite patella |
Postsurgical neuroma |
|
Blunt trauma, occult fracture |
Referred pain from hip |
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Osteochondritis dissecans (patella) |
Radicular pain from lumbosacral spine |
|
Sinding–Larsen–Johansson syndrome |
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