Table 1.

Head and Neck Primary Sites.

Primary Site	No.	%	ICD-O-3 Code
Total	183
Bones of skull and face  and associated joints	73	40	C41.0
Connective,  subcutaneous, other  soft tissue: head, face,  neck	55	30	C49.0
Mandible	17	9	C41.1
Peripheral nerves and  autonomic nervous  system: head, face, neck	5	3	C47.0
Ethmoid sinus	4	2	C31.1
Maxillary sinus	4	2	C31.0
Parotid gland	3	2	C07.9
Orbit, NOS	3	2	C69.6
Middle ear	2	1	C30.1
Nasopharynx, NOS	2	1	C11.9
Skin of scalp and neck	2	1	C44.4
Other	13	7	C00.1, C01.9, C02.0,
			C02.3, C04.9, C10.9,
			C15.3,
			C30.0, C31.2, C44.2,
			C44.3, C73.9, C75.1

Abbreviation: NOS, not otherwise specified.