Table 2:

Primary site of origin and tumor stage^{^a}

Site of Origin	T1	T2	T3	T4
Oropharynx	25	42	21	30
Oral cavity	31	34	17	34
Larynx	10	15	21	11
Maxillofacial and sinus (parotid, skin, nasal cavity, orbit lip, sinus, maxilla)	5	5	5	10
Hypopharynx	4	4	9	5
Nasopharynx	0	1	1	6
Trans-spatial	0	2	2	6

↵a Fewer patients are listed in Table 2 than in Table 1 because some patients had incomplete data in the registry. Three patients had unknown primaries.