"true" nodal status?
With neoadj therapy, prognostic infor of staging after therapy is likely the more telling.
Studies show slnbx after chemo still accurately predicts axillary nodal status. With current chemo, a 20-25% PCR is not unexpected and would include clearing previously pos nodes (found clinically or on prechemo ax u/s & fna). Delaying the slnbx can thus spare these patients additional axillary surgery.