Table 1 Characteristics of NPC patients with residual lesions treated by FSRT

Gender (n)

Male

104 (76.5)

Female

32 (23.5)

Age (years)

Median 43 (range:13–77)

Stage *

I

1 (0.7)

IIa

6 (4.4)

IIb

24 (17.6)

III

70 (51.5)

IVa

24(17.6)

IVb

11 (8.1)

Concurrent chemotherapy in primary RT

No

61 (44.9)

Yes

75 (55.1)

EBRT

Conventional EBRT

85 (62.5%)

IMRT

51 (37.5%)

EBRT dose (Gy)

Median 70 (range: 68.0–78.0)

Sites of local residual †

pharyngonasal cavity

116 (85.3)

parapharyngeal space

53 (40.0)

retropharyngeal lymph nodes

26 (19.1)

cavernous sinus

1 (0.7)