Table 2. Relationship between primary site of the tumor and the presence of neck recurrence among patients with squamous cell carcinoma (SCC) of the upper aerodigestive tract who underwent selective neck dissection (SND) (group 1) and MRND (group 2 or control) at the Division of Head and Neck Surgery, Santa Casa de São Paulo, between 1990 and 2001.

		Without neck recurrence	With neck recurrence	Total
Primary Site	Oral Cavity	27 (p = 0.55)	5 (p = 0.62)	32
	Larynx	21 (p = 0.30)	2 (p = 0.72)	23
	Pharynx	5 (p = 0.64)	3 (p = 0.05)	8
Total		53	10	63

Note: Among the four patients who are not mentioned, it was impossible to get any information about the presence or absence of neck recurrence.