Popliteal Cysts in Paediatric Patients: Clinical Characteristics and Imaging Features on Ultrasound and MRI
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.