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Table 1 Demographic data before the meniscectomy for the 10 patients with PAONK. Summary of continuous variables is shown as “mean (standard deviation)”

From: Extrusion of the medial meniscus is a potential predisposing factor for post-arthroscopy osteonecrosis of the knee

Patient No.

Age Sex

Side

Body weight (Kg)

BMI (kg/m2)

Period from the onset of pain to the MRI a

BME or osteonecrosis in MRI

Diagnosis (MRI, Arthroscopy)

OA grade

FTA

1.

70’s, F

L

70

30.3

12 wks

None

MMT, CM@MFC&MTP&PF

2

175o

2.

60’s, M

R

61

22.4

10 wks

None

MMT, CM@MFC&MTP

2

176o

3.

60’s, F

L

75

33.3

10 wks

None

MMT, CM@MFC&MTP

2

182o

4.

70’s, F

L

50

22.8

2 wks

None

MMT, CM@MFC&MTP

2

174o

5.

60’s, F

R

50

20.3

4 wks

None

MMT, CM@MFC&MTP&LTP&PF

2

178o

6.

60’s, F

L

52

21.6

14 wks

None

MMT, LMT, CM@MFC&PF

1

177o

7.

60’s, F

R

71

32.4

8 wks

None

MMT, CM@MFC&MTP

2

178o

8.

80’s, M

R

58

25.8

2 wks

None

MMT, CM@MFC&MTP

1

176o

9.

60’s, F

R

58

23.2

32 wks

None

MMT, LMT, CM@MFC&LTP&PF

2

168o

10.

60’s, F

R

64

26.6

31 wks

None

MMT, LMT, CM@MFC&MTP

0

178o

 Summary

67.5

 

60.9

25.9

12.5 wks

 

MMT: 10

G2: 7

176.2

 

(5.9)

 

(8.5)

(4.4)

(10.2)

 

CM@MFC: 10

G1: 2

(3.4)

       

CM@MTP: 8

G0: 1

 
  1. F Female, M Male, R Right, L Left, BME Bone marrow edema, MMT Medial meniscus tear, LMT Lateral meniscus tear, CM Chondromalacia, MFC Medial femoral condyle, MTP Medial tibial plateau, LTP Lateral tibial plateau, PF Patellofemoral, OA Osteoarthritis, FTA Femorotibial angle. a The period from the onset of the knee pain to the MRI examination