Table 1 Baseline characteristics of 33 patients with locally recurrent NPC

Sex

Male

26 (78.79)

Female

7 (21.21)

Age (years)

Mean ± SD

48.64 ± 10.29

 ≥ 50

14 (42.42)

 < 50

19 (57.58)

Tumor category

T1

5 (15.15)

T2

6 (18.18)

T3

11 (33.33)

T4

11 (33.33)

Node category

N0

2 (6.06)

N1

13 (39.39)

N2

14 (42.42)

N3

4 (12.12)

Clinical stage

II

3 (9.09)

III

15 (45.45)

IVa

15 (45.45)

SUVmax in primary tumor

Mean ± SD

11.43 ± 5.17

SUVmax in recurrent tumor

Mean ± SD

7.73 ± 4.06

V_pri in primary tumor (SUV = 2.5)

Median (range)

22.85 (4.16–105.09) cm³

V_high in primary tumor (SUV50%max)

Median (range)

5.57 (0–43.07) cm³

V_recur in recurrent tumor (SUV = 2.5)

Median (range)

9.98 (0.32–59.46) cm³