Poorly localized - Patellofemoral pain syndromeΔ
- Patellar subluxationΔ
- Patellar stress fracture
- Osteochondritis dissecansΔ
- Referred hip pain
- Referred back pain (L2/L3/L4 radiculopathy)
- Patellar stress fracture
- Tumors (malignant and benign)
Localized - Traction apophysitis
- Sinding-Larsen-Johansson disease (patellar apophysitis)Δ
- Osgood-Schlatter disease (tibial tubercle apophysitis)Δ
- Patellar and quadriceps tendinitisΔ
- Fat pad impingement (Hoffa disease)Δ
- Anterior cruciate ligament injury
- Bipartite and tripartite patella
- Prepatellar bursitis
| - Osteochondritis dissecansΔ
- Plica syndromeΔ
- Pes anserinus tendinitis
- Medial meniscus injury
- Medial collateral ligament injury
- Medial superior tibial stress fracture
- Adductor magnus muscle injury
- Referred hip pain
- Tumors (malignant and benign)
| - Discoid meniscusΔ
- Lateral meniscus injury
- Iliotibial band syndromeΔ
- Lateral collateral ligament injury
- Biceps femoris tendinitis
- Referred hip pain
- Referred back pain (L5 radiculopathy)
- Tumors (malignant and benign)
| - Popliteal (Baker's) cyst¶
- Hamstring (semimembranosus or biceps femoris) tendinitis
- Popliteus tendinitis
- Referred hip pain
- Referred back pain (S1 radiculopathy)
- Posterior cruciate ligament injury
- Deep vein thrombosis
- Tumors (malignant and benign)
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