Added value of blue dye in sentinel node biopsy for breast cancer.

2003 
Sentinel node biopsy in breast cancer is a new rapidly advancing minimal invasive procedure which enables nodal staging of clinically node negative breast cancer patients without performing complete axillary dissection. There are still controversies over the added value of Blue Dye when lymphoscintigraphy and gamma probe are used. In our series, 91 consecutive patients with invasive breast carcinoma were operated by a single surgeon, using lymphoscintigraphy, gamma probe and Blue Dye. The sentinel nodes (SLN) were histologically examined by HE and immunohistochemistry. Lymphoscintigraphy was succesful in 81 patients (89%). After the injection of Blue Dye, SLN could be identified in all 91 patients. Metastases in the SLN were present in 35 patients. We retrieved 128 SLN, of these 93 were hot and blue, 19 only hot and 16 only blue. The distribution of metastatic and nonmetastatic SLN between these three labeling groups was not different (P=0.9361). We could not show any difference in the metastatic involvement of SLN in patients in whom preoperative lymphoscintigraphy could visualise the SLN preoperatively compared to those in whom it could not (P=0.7315). False negativity calculated in our initial series of 36 patients was 0%. Our study showed added value of Blue Dye in detection of metastatic and nonmetastatic SLN.
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