Replanning Criteria and Timing Definition for Parotid Protection-Based Adaptive Radiation Therapy in Nasopharyngeal Carcinoma

Table 1

Patient characteristics.

Characteristics	Number of patients	Percent (%)
Gender
Male	40	80
Female	10	20
Age	11–80 years (median, 44 years)
UICC stage (2002)
T
1	13	26
2	16	32
3	13	26
4	8	16
N
0	18	36
1	15	30
2	15	30
3	2	4
M
0	50	100
Treatment method
RT	20	40
CCRT	13	26
ICT + CCRT	17	34
Primary tumor volume	37.54 25.23 (4.36–118.00) cm^3
Volume of metastatic nodes	13.15 23.18 (0–133.35) cm^3
Weight loss rate at the end of RT	10.80 4.12%

RT: radiation therapy; CCRT: concurrent chemoradiotherapy; ICT: induced chemotherapy.