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The current application of ACOSOG Z0011 trial results: Is further implementation of sentinel lymph node intra-operative histopathological examination mandatory in breast cancer patients - a single-centre analysis.
Neoplasma 2018 March 15
The main objective of the ACOSOG Z0011 trial was to determine the impact of abandoning complete axillary lymph node dissection (ALND) on survival of breast cancer patients with sentinel node lymph (SLN) metastasis in whom breast conserving therapy (BCT) had been performed. The aim of our study was to assess the clinical value of intra-operative histopathological examination of SLN. Our study comprised 1284 invasive breast cancer patients in whom sentinel lymph node biopsy (SLNB) was carried out. SLN intra-operative histopathological assessment was routinely performed in patients treated within the first period (07.2013-06.2014). However, the decision regarding intra-operative assessment was made by the surgeon for the patients who underwent this evaluation in the later period 07.2014-06.2015 and were submitted for BCT. BCT was performed in 72.4% of patients. In total, 316 patients (24.6%) developed SLN-metastasis. Within the period 07.2014-06.2015, SLN intra-operative microscopic evaluation was performed in 20.8% of patients submitted for BCT. ALND was omitted in 27.5% of patients demonstrating SLN metastasis, in comparison with 15.5% of the group from the previous period (p=0.0094). The proportion of patients demonstrating macrometastasis in SLN who received conservative treatment to the axilla increased from 5.4% to 23.1% (p=0.0007). The choice of SLN final histopathological assessment may allow for deferral of decision on more extensive surgery of the axilla in patients submitted for SLNB. The omission of routinely-performed SLN intra-operative histopathological evaluation has led to a statistically significant increase in the proportion of patients in whom complete ALND was avoided.
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