Table 1.

Patient characteristics

Patient	Location	Classification	Lymph nodes involved	PTVelective	PTVboost
				volume (cm3)	volume (cm3)
1	Base of tongue R	T1N2aM0	2 & 3 R	501	105
2	Tonsil R	T2N2cM0	3 R & 2 bilat	621	234
3	Tonsil L	T3N2cM0	1,2,3,4 bilat	992	381
4	Base of tongue R	T3N2cM0	1b R & 2 bilat	836	422
5	Tonsil L	T2N1M0	2 L	571	146
Average				704	258