Diagnostic value for extrahepatic metastases of hepatocellular carcinoma in positron emission tomography/computed tomography scan

Table 3 Diagnostic value of ¹⁸F-fluorodeoxyglucose positron emission tomography/computed tomography scan and conventional imaging modalities for detection of extrahepatic metastases

	Lung metastases (n = 23)		Lymph node metastases (n = 22)		Bone metastases (n = 11)
	TP	TN	TP	TN	TP	TN
PET (+)	14	1	20	4	11	0
Conventional (+)	23	2	22	4	7	4
	PET	Conventional	PET	Conventional	PET	Conventional
Sensitivity, %	60.9	100	90.9	100	100	63.6
Specificity, %	99.1	98.2	96.5	96.5	100	96.8
Accuracy, %	92.6	98.5	95.6	97.1	100	94.1
PPV, %	93.3	92	83.3	84.6	100	63.6
NPV, %	92.5	100	98.2	100	100	96.8
Comparison of ROC curves	P = 0.000		P = 0.269		P = 0.010
	(CI: 0.0888-0.294)				(CI: 0.0481-0.348)

TP: True positive; TN: True negative; PPV: Positive predictive value; NPV: Negative predictive value; ROC: Receiver operating characteristic; PET: Positron emission tomography.