KELLGREN LAWRENCE CLASSIFICATION


      • Grade 0 no radiographic features of OA are present
      • Grade 1 doubtful joint space narrowing and possible osteophytic lipping
      • Grade 2 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 definite bony deformity