Case contributed by Zeeshan Ghias Khan
Diagnosis almost certain


Right knee pain

Patient Data

Age: 45 years
Gender: Female

AP projection reveals severe loss of joint space (medial > lateral) compartments associated with osteophytes and subchondral sclerosis. Mild tibial spiking. Lateral projection shows narrowing of patellofemoral space with patellar osteophytes. Mild joint effusion.

Case Discussion

Currently, the Kellgren-Lawrence (KL) grading scheme is the most- widely used and accepted standard for diagnosis of radiographic OA

  • Grade 0: No radiographic features of OA are present
  • Grade 1: Doubtful joint space narrowing (JSN) and possible osteophytic lipping.
  • Grade 2: The presence of definite osteophytes and possible JSN on anteroposterior weight-bearing radiograph.
  • Grade 3: Multiple osteophytes, definite JSN, sclerosis, possible bony deformity
  • Grade 4: Large osteophytes, marked JSN, severe sclerosis and definitely bony deformity

How to use cases

You can use Radiopaedia cases in a variety of ways to help you learn and teach.

Creating your own cases is easy.

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.