Table 3.
The clinical characteristics of primary GCT around the knee by age in China.
| Categories | ≤40 years | >40 years | Total | P |
|---|---|---|---|---|
| Location 1, n (%) | 0.086 | |||
| Distal femur | 115 (49.8) | 60 (58.3) | 175 (52.4) | |
| Proximal tibia | 103 (44.6) | 42 (40.8) | 145 (43.4) | |
| Others | 13 (5.6) | 1 (1.0) | 14 (4.2) | |
| Location 2, n (%) | 0.042 | |||
| Left knee | 100 (43.3) | 57 (55.3) | 157 (47.0) | |
| Right knee | 131 (56.7) | 46 (44.7) | 177 (53.0) | |
| Location 3, n (%) | 0.067 | |||
| Non-centricity growth | 184 (84.4) | 79 (77.5) | 263 (82.2) | |
| Centricity growth | 34 (15.6) | 23 (22.5) | 57 (17.8) | |
| Campanacci grade, n (%) | 0.923 | |||
| I | 26 (11.3) | 11 (10.7) | 37 (11.1) | |
| II | 105 (45.5) | 45 (43.7) | 150 (44.9) | |
| III | 100 (43.3) | 47 (45.6) | 147 (44.0) | |
| Ennecking stage, n (%) | 0.005 | |||
| T0 | 103 (44.6) | 35 (34.0) | 138 (41.3) | |
| T1 | 85 (36.8) | 32 (31.1) | 117 (35.0) | |
| T2 | 43 (18.6) | 36 (35.0) | 79 (23.7) | |
| Soft tissue extension and mass | 0.009 | |||
| None of them | 86 (37.2) | 32 (31.1) | 118 (35.3) | |
| Soft tissue extension without mass | 102 (44.2) | 36 (35.0) | 138 (41.3) | |
| Both of them | 43 (18.6) | 35 (34.0) | 78 (23.4) | |
| Pathologic fracture, n (%) | 0.756 | |||
| No | 157 (68.0) | 67 (65.0) | 224 (67.1) | |
| Simple | 47 (20.3) | 21 (20.4) | 68 (20.4) | |
| Complex | 27 (11.7) | 15 (14.6) | 42 (12.6) | |
| Surgical treatment, n (%) | 0.021 | |||
| Intralesional curettage | 60 (26.1) | 17 (16.5) | 77 (23.1) | |
| Curettage combined with resection | 118 (22.6) | 50 (47.6) | 168 (50.3) | |
| En bloc marginal resection | 52 (22.6) | 37 (35.9) | 89 (26.6) |