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Table 3 Morphological and radiological cyst characteristics in the study group

From: Predictive characteristic of simple bone cyst treated with curettage and bone grafting

  Positive response Recurrence Test value p -value
Sample size 14 10   
Cyst location
 Humerus, n (%) 1 (7.14) 5 (50.0) χ2 = 9.351 p < 0.05
 Femur, n (%) 6 (42.86) 5 (50.0)
 Tibia, n (%) 2 (14.29) 0
Other localistaion [calcaneus phalanx], n(%) 5 (35.71) 0
Cyst location: shaft/metaphysis
 Metaphysis, n (%) 7 (50.0) 7 (70.0)   p = 0.210
 Shaft, n (%) 7 (50.0) 3 (30.0)
Cyst activity
 Active cyst, n (%) 4 (28.57) 3 (30.0)   p = 0.347
 Latent cyst, n (%) 10 (71.43) 7 (70.0)
Number of cavities
 Uninocular, n (%) 9 (64.29) 3 (30.0)   p = 0.089
 Mulitlocular, n (%) 5 (35.71) 7 (70.0)
Pathological fractures at the time of diagnosis
 Yes, n (%) 4 (28.57) 8 (80.0)   p = 0.017
 No, n (%) 10 (71.43) 2 (20.0)
Enneking stage
 IA, n (%) 11 (78.57) 5 (50.0)   p = 0.089
 IB, n (%) 3 (21.43) 4 (40.0)
 IC, n (%) 0 1 (10.0)
Radiological parameters
 Mean cyst area, cm2 (SD) 9.99 (7.36) 22.59 (11.55) z = 3.121 p < 0.01
 Mean cyst index of Kaelin and MacEwen (SD) 10.14 (9.74) 19.79 (10.54) z = 2.213 p < 0.05
 Mean cyst diameter ratio (SD) 2.16 (1.72) 3.92 (2.01) z = 2.202 p < 0.05
 Mean minimal cortical thickness, mm2 (SD) 0.25 (0.01) 0.19 (0.14) z = 1.202 p > 0.05
 Mean ratio of the minimal cortical thickness to the cortical thickness in the diaphysis (SD) 0.61 (0.25) 0.41 (0.27) z = 1.784 p > 0.05