Table 7. Data of IMRT for locally recurrent NPC.

	Lu et al [6]	Chua et al [8]	Lee et al [10]		Han et al [7]	Qiu et al [9]		Current study
			CMT	EBRT
Case	49	31	13	16	239	70		54
rT stage
rT1	8.1%	10%	69%	25%	6.7%	4.3%	5.6%
rT2	18.4%	16%	15%	6%	18%	35.7%	14.8%
rT3	22.4%	29%	15%	31%	29.7%	28.6%	16.7%
rT4	51%	45%	0	38%	45.6%	34.3%	63%
GTV	47.2ml	28.1ml	NR		37.69ml	NR	59.4ml
PTV	NR	39.2ml	NR		NR	NR	134ml
Dose	71.4Gy (68.7-75.4)	56.8 (50.2-64), 32.3% had SRS boost of 8.5-12.5Gy	45Gy of EBRT and 20Gy of brachy- therapy	59.4Gy (39.6-61)	69.94Gy (61.7-78.7)	70Gy (50-77.4)	68.5Gy (49.8-76.8)
Chem	NR	68% of induction	93% of peri-radiation 79.3% of concurrent		49%	70% of concurrent	51.9%
LC	100%-9m	61% -1 y	53%- 5y	52%- 5y	85.8% -5y	49.3% -3y	66.1%-2y
OS	NR	63% -1 y	60%- 5y	57% -5y	44.9% -5y	51.9% -3y	44.3% -2y
Late toxicity		25%	8%	75%	70.3%	35.7%	48.1%
Brain necrosis	NR	7%	8%	18.8%	25.8%	NR	18.5%
Soft tissue necrosis	NR	0	0	0	40.6%	15.7%	31.5%
Cranial neuropathy	NR	10%	0	12.5%	NR	24.3%	3.7%
Massive haemorraghe	NR	0	0	0	NR	NR	13%
Difficulty in feeding	NR	0	0	0	NR	NR	20.4%