What is nodular synovitis knee?

Localized nodular synovitis is a benign lesion characterized by localized synovial proliferation. predominantly found in the tendon sheaths or joints of the fingers and toes, and rarely in larger joints such as the knee or ankle.

Can PVNS calcify?

PVNS is most commonly monoarticular (~70% knee joint) but occasionally it can be oligoarticular. The histology of PVNS can look similar to some aggressive neoplasms (rhabdomyosarcoma, synovial sarcoma, epithelioid sarcoma) and imaging, therefore, has a crucial role in guiding the pathologist.

Does Pvns show on xray?

PVNS in the knee typically manifests as a non-specific joint effusion on radiographs, although occasionally the fluid may appear dense, a finding suggestive of hemorrhagic effusion.

What is shoulder Pvns?

Pigmented villonodular synovitis (PVNS) is a rare proliferative disease that usually affects the synovial membrane of joints or tendon sheaths resulting in joint swelling and bone erosion, affecting 2.4% of cases the shoulder joint (1).

Is there a cure for PVNS?

The best way to treat PVNS is to remove the lining of the joint. This can be done with traditional surgery or with arthroscopy. In arthroscopy, the doctor makes a tiny cut in the skin over your joint. Then a thin tube is put into the joint to remove the lining.

How does pigmented villonodular synovitis ( PVNS ) affect the knee?

Pigmented Villonodular Synovitis. The mass or tumor that results from this overgrowth is not cancerous and does not spread (metastasize) to other areas of the body. PVNS is a progressive disease, however, that slowly worsens and can lead to bone damage and arthritis. PVNS usually affects the knee although it can affect other joints as well.

How to diagnose PVNS of the knee?

PVNS of the knee presents a difficult differential diagnosis. In many cases, only MRI is able to identify the presence of haemosiderin precipitates within the nodules characterizing the lesion. The use of standard and dynamic contrast media seems unable to provide additional diagnostic information. …

What kind of MRI is used to diagnose PVNS?

(3a) In another patient with PVNS, A T1-weighted sagittal image reveals extension of the process into the patellar tendon (arrow). On (3b), the proton density-weighted axial image with fat-suppression, osseous erosion into the patella (arrow) is also evident. PVNS is considered a diffuse process.

How is localized nodular synovitis of the knee treated?

A retrospective review of MR imaging of the knee was performed in 21 patients with histologically confirmed localized nodular synovitis. Surgical excision of the lesion was performed in all patients. The MR imaging appearances of the lesions were defined, and the clinical and surgical findings were reviewed. RESULTS.