Table 1: Clinical Characteristics of GCT of Bone Patients

Case No.# Age Gender Location Situation* Operative Procedure Follow up Period** TRACP 5b
1 21 F proximal tibia primary curettage / 1500 <***
2 26 M distal femur primary curettage / 1500 <
3 51 F distal femur primary curettage## / 1500 <
4 74 F distal radius primary wide resection / 1500 <
5 52 F distal radius local reccurence curettage 8Y 656
6 36 F proxima tibia local reccurence curettage 16Y 5M 856
7 43 F proximal tibia local reccurence curettage 6Y 2M 747
8 38 M distal femur no reccurence curettage 3Y 4M 332
9 25 F distal femur no reccurence curettage 4Y 8M 493
10 34 M proximal humerus no reccurence curettage 4Y 1M 326
11 40 F ischium no reccurence curettage 4Y 3M 168
12 67 M proximal humerus no reccurence wide resection 9Y 5M 384

# No pulmonary metastasis was observed in any patient.
* Patients without any prior treatment are 'primary', those with operative treatment following local reccurence are 'local reccurence', and those with operative treatment without local reccurence are 'no reccurence'.
** Duration between the operative treatment and the occurrence of the local recurrence (local recurrence group) or the measurement of TRACP 5b (no recurrence group). Y, year; M, month.
*** Measurement data are more than 1500 mU/dL.
## Pathological fracture occurred during curettage.