Should a Sentinel Node Biopsy Be Performed in Patients with High-Risk Breast Cancer?

Table 2

Calculated posttest probability of residual axillary disease despite negative SLN biopsy for a range of pretest probabilities for axillary disease with varying sensitivities of SLN biopsy.

	Posttest probability of axillary disease
Pretest	Sens 0.85	Sens 0.90	Sens 0.95
0.05	0.008	0.005	0.003
0.1	0.016	0.011	0.006
0.2	0.036	0.024	0.012
0.3	0.060	0.041	0.021
0.4	0.091	0.063	0.032
0.5	0.130	0.091	0.048
0.6	0.184	0.130	0.070
0.7	0.259	0.189	0.104
0.8	0.375	0.286	0.167
0.9	0.574	0.474	0.310