Table 1 Baseline characteristics

Age (years)

Median (range)

63 (18–88)

 Sex

 Male

49

59.8

 Female

33

40.2

Number of lesions

 One

57

69.5

 Two

18

22

 Three

6

7.3

 Four

1

1.2

Primary tumor

 Lung

29

35.4

 Bladder

1

1.2

 Bile duct

1

1.2

 Multiple myeloma

1

1.2

 Liver

5

6.1

 Femur

1

1.2

 Colon

2

2.4

 Choroidal malignant melanoma

1

1.2

 Prostate

3

3.7

 Breast

11

13.4

 Kidney

5

6.1

 Esophagus

7

8.5

 Stomach

7

8.5

 Lower jaw

1

1.2

 Pancreas

1

1.2

 Unidentified primary adenocarcinoma

2

2.4

 Uterus

2

2.4

 Mediastinum

2

2.4