Photos
Differential Diagnosis
DDx Strength:
Weak
Knee pain, Muscle weakness
Osteoarthritis


Knee injury

Peroneal mononeuropathy

Venous malformation


Acute compartment syndrome

Patellar fracture

Patellar dislocation

Tendonitis

Traumatic neuroma


Avascular necrosis


Neurofibromatosis


Ganglion cyst


Pes anserine pain syndrome

Psoriatic arthropathy


Rheumatoid arthritis


Clear cell sarcoma

Diffuse tenosynovial giant cell tumor

Osteochondroma

Iliotibial band syndrome

Meniscal injury

Patellar tendinopathy

Patellofemoral pain syndrome

Prepatellar bursitis

Patellar clunk syndrome

Reactive arthritis


Semimembranosus tendinopathy

Septic arthritis


Immunoglobulin A vasculitis


Aneurysmal bone cyst

Transient synovitis of hip

Osgood-Schlatter disease

Bursitis


Calcium pyrophosphate deposition disease


Gout


Hip fracture

Lipoma


Complex regional pain syndrome

Deep vein thrombosis


Enchondroma

Hip injury

Lyme disease


Meralgia paresthetica

Phlebitis


Popliteal cyst

Quadriceps tendinopathy

Sarcoidosis


Sickle cell acute pain crisis

Osteochondral defect


Ankylosing spondylitis


Chondrosarcoma

Giant cell tumor of tendon sheath


Glomangiomas


Glomus tumor


Hemochromatosis


Liposarcoma

Neurilemmoma


Osteonecrosis of the femoral heads

Patellar tendon rupture

Periostitis


Quadriceps tendon rupture
