Knee pain
More common causes
Osgood-Schlatter disease
Patellar tendinitis
Knee osteoarthritis
Patellofemoral pain syndrome
Gout
Acute bursitis
Rheumatoid arthritis
Fibromyalgia
Tendinitis
Lyme disease
Osteochondritis dissecans
Less common causes
Septic arthritis
Knee injury
Psoriatic arthritis
Rheumatic fever
Reactive arthritis
Systemic lupus erythematosus
Calcium pyrophosphate deposition disease
Hemarthrosis
Axial spondyloarthritis
Iliotibial band syndrome
Synovial sarcoma
Osteonecrosis
Chondromalacia patellae
Meniscal pathology
Osteosarcoma
Uncommon causes
Ruptured Baker's cyst
Infrapatellar fat pad syndrome
Sinding Larsen-Johannson disease
Neuropathic arthropathy of the knee
Tenosynovial giant cell tumor