Table 1 Demographic parameters

Median age at index surgery

14 years (range 6–25)

Median follow up time

36.5 months (range 12–80)

Median time to recurrence after index surgery

9.5 months (range 4–51)

Sex

Male/Female

13/5

Localization

Humerus

13

Femur

4

Tibia

1

Imaging

Median cyst volume

27ml (range 10–63)

Soft tissue leakage

6

Tumor entities

Unicameral bone cyst

13

Aneurysmal bone cyst

2

Non-ossifying fibroma

2

Secondary aneurysmal bone cyst

1

Recurrent lesion

11

Surgical procedure

Percutaneous treatment

11

Curettage

7

Median amount BCBS delivered

18ml (range 10–38)