you're reading...

Synovial Osteochondromatosis – Differential Diagnosis

History: 50 year old male with knee pain.

Lateral radiograph of the knee reveals multiple intra-articular bodies and marked degenerative changes of the femorotibial and patellofemoral compartments.

Lateral radiograph of the left knee reveals multiple calcified intra-articular bodies and marked degenerative changes of the femorotibial and patellofemoral compartments.

This is a case of synovial osteochondromatosis, which can be either primary or secondary. Primary synovial osteochondromatosis (or chondromatosis alone, if the bodies are not all ossified) is a benign idiopathic neoplasm of the synovium characterized by multiple loose intra-articular cartilaginous bodies, some of which may be ossified. Secondary synovial osteochondromatosis is seen with coexistent osteoarthosis, as seen in the image above. A general distinction in the secondary form is multiple bodies of differing sizes with concentric rings of growth.

The differential diagnosis includes primary versus secondary osteochondromatosis, pigmented villonodular synovitis, intra-articular chondroma, synovial chondrosarcoma, and periosteal chondroma.

Credit to Quinn Meisinger, M.D. for this classic example of secondary synovial osteochondromatosis.

About radiologypics

I am a radiology physician from California, USA.


2 thoughts on “Synovial Osteochondromatosis – Differential Diagnosis

  1. Hello! I understand this is somewhat off-topic but I needed to ask.

    Does running a well-established website such as yours take a large amount of
    work? I am brand new to writing a blog however I do write in my journal everyday.
    I’d like to start a blog so I can easily share my own experience and feelings online. Please let me know if you have any suggestions or tips for new aspiring bloggers. Thankyou!

    Posted by msn hotmail | May 30, 2013, 6:39 pm


  1. Pingback: Charcot Joint Mnemonic – The 6 D’s of a Charcot Joint | RADIOLOGYPICS.COM - March 24, 2013

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: