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Table 2 Risk group classification of primary tumor sites according to local control rates

From: Local control of bone metastases treated with external beam radiotherapy in recent years: a multicenter retrospective study

Primary tumor sites

6 months (%)

12 months (%)

36 months (%)

Unfavorable group

 Esophagus

61

49

49

 Hepatobiliary/pancreatic

54

49

38

 colorectal

85

43

21

Moderately unfavorable group

 Kidney/ureter

75

75

48

 Sarcoma/melanoma/mesothelioma

84

84

28

Favorable group

 Lung

83

79

76

 Breast

98

98

98

 Head and neck

88

88

68

 Gynecological

100

100

86

 Others

94

86

86