Arthroscopy

PVNS

Definition

 

Pigmented Villo-Nodular Synovitis

- benign inflammatory process that arises in synovial tissues

- contains significant amounts of hemosiderin

 

Epidemiology

 

Age: 20 - 50

Sex: M > F

 

Types

 

A.  Diffuse

- throughout joint synovium

- more difficult to treat / excise fully

 

Background

Intact PCL

Anatomy

 

Size

 

2 x as strong as ACL

About the same length as ACL 38 mm

 

Cross sectional area 150% of ACL

13 mm diameter (thicker) 

 

2 Bundles

 

1.  Anterolateral

- most important

- double the size of the posteromedial

- tight in flexion

- try to reconstruct this bundle

External snapping hip

Causes

 

Most common

- fascia lata on greater trochanter

- iliopsoas on lesser trochanter

 

1.  Intra-articular structures

- labrum

- ligamentum Teres

- loose bodies

- synovial chondromatosis

- osteochondoma

 

2.  Extra-articular structures

- fascia lata on greater trochanter (common)