Table 1: Between-groups comparison of ultrasonography and MRI findings in 80 patients with clinically suspected Baker cysts.

Patients with arthritis

Patients with joint hypermobility

Others

Age, years

10.4 ± 4.4

.075

Female sex, (%)

8 (47%)

0 (0%)

26 (46%)

.090

Ultrasonography

Joints examined,

28

12

107

BC all,

16

7

32

.007

BC bilateral,

4

1

4

.099

Cyst volume, mL

.471

Anechogenic cysts, (% BC all)

6 (37%)

4 (57%)

26 (81%)

.009

Echogenic cysts w/o septations, (% BC all)

10 (63%)

3 (43%)

6 (19%)

.009

Synovitis, (% BC all)

8 (50%)

0 (0%)

0 (0%)

BC and joint effusion (% BC all)

11 (69%)

1 (14%)

3 (9%)

<.001

BC communication with joint space, (% BC all)

8 (50%)

6 (86%)

21 (66%)

.264

MR imaging

Joints examined,

6

2

16

BC all,

5

2

7

.134

Cyst volume, mL

.389

BC and joint effusion (% BC all)

4 (80%)

0 (0%)

1 (14%)

.056

BC communication with joint space, (% BC all)

5 (71%)

2 (100%)

7 (100%)

.615

US: ultrasonography, MR: magnetic resonance, and BC: Baker cyst. values were calculated with Chi-Square test, Fisher’s exact test, and Kruskal-Wallis test (age, cyst volume), as appropriate.