This patient was a 45-year-old male, with bilateral knee joint swelling for 2 years.
He had no other evidence of rheumatologic diseases.
US showed large effusion of knee joint, with echogenic protrusions inside the joint.
Fist, I wonder how to distinguish synovitis and swelling fat pad.
By their echo? Synovitis are hypoechoic and fat pad are echogenic?
And can the echogenic protrusions in the case be Lipoma arborescens?
Thank you very much, Steve.