Table 5 Diagnostic performance of ¹⁸FDG-PET/CT and ¹³¹IWBS based on organ analysis in relation to histopathological results, conventional radiological tools and lesion behavior overtime

 ¹⁸FDG-PET/CT

 Bone

15

–

1

3

Sensitivity

85.2%

 Lung

8

–

–

–

Specificity

100%

 Liver

3

–

–

2

PPV

100%

 LN

13

–

2

NPV

10%

 Thyroid bed

13

–

–

2

Accuracy

85.5%

 Sum

52

0

1

9

¹³¹IWBS

 Bone

12

1

–

6

Sensitivity

77%

 Lung

8

–

–

–

Specificity

0%

 Liver

3

–

–

2

PPV

97.9%

 LN

11

–

–

4

NPV

0%

 Thyroid bed

13

–

–

2

Accuracy

75.8%

 Sum

47

1

0

14