Table 2. Large series reporting patterns of failure using intensity-modulated radiotherapy for head and neck squamous cell carcinoma.

HNSCC = Head and neck squamous cell carcinoma

	Number of patients	Tumor site	Median follow-up (months)	In-field failures	Marginal failures	Out-of-field failures
Daly et al. [18]	107	Oropharynx	29	8	0	0
Garden et al. [19]	776	Oropharynx	54	77	7	5
Raktoe et al. [​​​​​7]	131	Oropharynx	40	35	0	4
Chao et al. [20]	126	HNSCC	26	17	3	0
Eisbruch et al. [11]	133	Non-nasopharyngeal	32	21	4	0
Yao et al. [21]	150	HNSCC	18	11	1	0
Studer et al. [22]	280	HNSCC	23	77	1	3
Schoenfeld et al. [12]	100	HNSCC	37	10	2	0
Jewish General Hospital, Montreal	272	HNSCC	43	14	1	1