Utility of 18F-fluoro-deoxyglucose emission tomography/computed tomography fusion imaging (18F-FDG PET/CT) in combination with ultrasonography for axillary staging in primary breast cancer

Table 2 Diagnostic performance of ¹⁸ F-FDG PET/CT and ultrasonography in axillary staging

¹⁸F-FDG uptake	TP	TN	FP	FN	Sensitivity (%)	Specificity (%)	PPV (%)	NPV (%)	Accuracy (%)
Visual assessment	34	118	6	25	57.6	95.2	85	82.5	83.1
SUV cutoff point
0.8	30	118	6	29	50.8	95.2	83.3	80.3	80.9
1.3	24	122	2	35	40.7	98.4	92.3	77.7	79.8
1.5	21	123	1	38	35.6	99.2	95.5	76.4	78.7
1.8	21	124	0	38	35.6	100	100	76.5	79.2
2	20	124	0	39	33.9	100	100	76.1	78.7
3	16	124	0	43	27.1	100	100	74.3	76.5
AUS	32	123	1	27	54.2	99.2	97	82	84.7
Visual assessment of ¹⁸F-FDG uptake Combined with AUS	38	117	7	21	64.4	94.4	84.4	84.8	84.7

AUS, Axillary ultrasonography; TP, True positive; TN, True negative; FP, False positive; FN, False negative; PPV, Positive predictive value; NPV, Negative Predictive value;

ISSN: 1471-2407