Outcomes of breast cancer patients with micrometastases and isolated tumor cells in sentinel lymph nodes.
BACKGROUND
The prognostic value and clinical implication of micrometastases and isolated tumor cells (ITCs) in sentinel lymph nodes are still not clearly defined. This study was designed to collect clinical pathological data in our Institution.


METHODS
Twenty-five cases of micrometastases and nine cases of ITCs were identified among 1,000 sentinel lymph node biopsies performed at our institution in the last 10 years.


RESULTS
In the 25 patients with sentinel node micrometastases, 12 had completion axillary node dissection, and only one of these twelve had non-sentinel node micrometastasis. In this group, two patients developed local recurrence, and two patients developed distant metastases (one with and one without prior local recurrence) and later died. Both patients had negative non-sentinel lymph nodes. In the 9 patients with sentinel node ITCs, no patient had completion axillary node dissection and no patient developed local or distant metastases.


CONCLUSIONS
Completion axillary node dissection may not be necessary in patients with sentinel node micrometastases and ITCs as it does not impact local recurrence. ITCs do not seem to have prognostic significance. Micrometastases, however, may be associated with local and/or distant metastasis.
Department of Pathology and Laboratory Medicine, University of Kansas Medical Center, 3901 Rainbow Blvd., Kansas City, KS 66160-7417, USA.
Nika C
NC
Gloyeske
Wamda
W
Goreal
Maura
M
O'Neil
Carol
C
Connor
Ossama W
OW
Tawfik
Fang
F
Fan
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001943:Breast Neoplasms / Q000473:pathology*; D005260:Female; D006801:Humans; D008207:Lymphatic Metastasis; D008875:Middle Aged; D009362:Neoplasm Metastasis; D021701:Sentinel Lymph Node Biopsy