TABLE 2:

Performance of combined criteria of helical CT and Doppler sonography for 17 patients with recurrent cancer in the cervical lymph nodes

		Lymph nodes (n=255)
No. of metastasis		30
No. of reactive nodes		225
	Combination	CT	Sonography
No. of false positive nodes	0	5	13
No. of false negative nodes	2	3	2
Sensitivity (%)	87	83	87
Specificity (%)	100	97	94
Positive predictive value (%)	100	87	67
Negative predictive value (%)	99	99	99