Additive value of 18FDG-PET/CT to positive 131I whole body scan in recurrent differentiated thyroid cancer patients with potential influence on treatment strategy: single Egyptian center experience

Egyptian Journal of Radiology and Nuclear Medicine

Table 3 Organ- and lesion-based analysis by ¹⁸FDG-PET/CT and ¹³¹I TxWBS in the context of histopathology, conventional radiological tools and lesion behavior over time

Variable	¹⁸FDG-PET/CT	¹³¹I TxWBS	Confirmatory investigations	¹⁸FDG-PET/CT	¹³¹I TxWBS	Confirmatory investigations
Variable	O	O	O	L	L	L
Lung	8	8	8	12	12	12
Bone	15	13	18	45	44	64
Liver	3	3	5	3	3	5
Thyroid bed	13	13	15	16	16	19
LN	13	11	15	22	12	24
Sum	52	48	61	98	87	124
Kappa	0.16¹ 0.03² 0.69³			0.04¹ 0.02² 0.78³
P	0.02* 0.59 NS < 0.001**			0.34 NS 0.56 NS < 0.001**

O, organ; L, lesion; NS, non-significant (p > 0.05)
^*Significant (p < 0.05)
^**Highly significant (p < 0.01)
¹Confirmatory versus ¹⁸FDG-PET/CT; ²Confirmatory versus ¹³¹I TxWBS; ^{3 18}FDG-PET/CT versus ¹³¹I TxWBS