Background: Sentinel lymph node biopsy (SLNB) is a developing alternative t
o axillary dissection and may prove to be accurate in the detection of micr
ometastases in lymph nodes of breast cancer patients. Limited studies exist
in the use of SLNB after neoadjuvant therapy. This study was undertaken to
determine the accuracy of SLNB after neoadjuvant chemotherapy.
Methods: Thirty-Orle patients with stage I or II breast cancer underwent SL
NB after neoadjuvant chemotherapy.
Results: Lymphatic mapping was performed by radioisotope, blue dye, or both
techniques. Sentinel nodes (SN) were identified in 29 patients (93.5%). Th
e SN was positive in 11 patients (38.0%), and was the only positive node in
5 patients (45.5%). There were no false negative SN by hematoxyin and eosi
n stain or immunohistochemistry (IHC) studies.
Conclusions: Sentinel node identification rate is similar to that in nonneo
adjuvant studies. The sentinel node accurately predicted metastatic disease
in the axilla. IHC studies failed to detect any additional micrometastases
. This diagnostic technique may provide treatment guidance for patients aft
er neoadjuvant therapy. (C) 2001 Excerpta Medica, Inc. All rights reserved.