Table 2. ¹⁸F-FSPG and ¹⁸F-FDG evaluation of primary lesion.

	IPNs (7-30mm)		Mass (>30mm)
	Malignant (N = 12)	Benign (N = 9)	Malignant (N = 5)
18 F-FDG
Positive–no. (%)	7 (58)	2 (22)	5 (100)
Negative–no. (%)	5 (42)	7 (78)	0
SUVmax, Median (IQR)	2.2 (1.6–4.3)	1.4 (0.7–1.8)	11.3 (10.1–17.1)
18 F-FSPG
Positive–no. (%)	9 (75)	3 (33)	5 (100)
Negative–no. (%)	3 (25)	6 (67)	0
SUVmax, Median (IQR)	1.2 (1–1.7)	0.7 (0.4–1.0)	8.5 (6.7–8.8)

SUVmax–Maximum standardized uptake value

¹⁸F-FSPG SUVmax >1 and ¹⁸F-FDG SUVmax >2 defines a positive result