Table 4 Diagnostic performance of ¹⁸FDG-PET/CT and ¹³¹I WBS based on lesion analysis in relation to histopathological results, conventional radiological tools and lesion behavior overtime

¹⁸FDG PET/CT

 Bone

45

–

1

19

Sensitivity

78.2%

 Lung

12

–

–

–

Specificity

50%

 Liver

3

–

–

2

PPV

99%

 LN

21

1

–

3

NPV

3.6%

 Thyroid bed

16

–

–

3

Accuracy

77.8%

 Sum

97

1

1

27

I¹³¹WBS

 Bone

43

1

–

21

Sensitivity

69.4%

 Lung

12

–

–

–

Specificity

50%

 Liver

3

–

–

2

PPV

98.9%

 LN

12

–

1

12

NPV

2.6%

 Thyroid bed

16

–

–

3

Accuracy

69%

 Sum

86

1

1

38