Number (N = 119)

Frequency (%)

Global headquarters

Isolated left

26

21.85

Isolated line

28

23.5

Bilateral

65

54.5

Radiographic localization

Isolated femorotibial

26

21.85

Isolated femoropatellar

10

8.4

Bi-compartmental or tri-compartmental

83

69.75

Radiographic classification according to Kellgren and Lawrence

Stage 2

24

21.2

Stage 3

80

67.2

Stage 4

15

12.6