Table 4 Summary of clinical outcomes of primary Ewing sarcoma/peripheral primitive neuroectodermal tumors in the cranial bone and mobile spine

Resection mode

 GTR/ without GTR

19/14

15 vs. 5

0.001

37 vs. 13

 < 0.001

Postoperative radiotherapy

 Yes / no

19/14

25 vs. 7

 < 0.001

37 vs. 13

 < 0.001

Postoperative chemotherapy

 Yes / no

18/15

15 vs. 10

0.291

25 vs. 24

0.603

GTR + radiotherapy

 Yes / no

15/18

45 vs. 7

 < 0.001

61 vs. 13

 < 0.001

GTR + chemotherapy

 Yes/no

11/22

15 vs. 10

0.053

37 vs. 24

0.062