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Videosurgery and Other Miniinvasive Techniques
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4/2022
vol. 17
 
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General surgery
abstract:
Original paper

Study on intraoperative localization of sentinel lymph nodes using freehand SPECT in breast cancer patients

Maria-Ioanna Argentou
1
,
Evangelos Iliopoulos
1
,
Georgios-Ioannis Verras
1
,
Francesk Mulita
1
,
Levan Tchabashvili
1
,
Trifon Spyridonidis
2
,
Dimitrios Apostolopoulos
2

  1. Breast Unit, Department of Surgery, University Hospital of Patras, Patras, Greece
  2. Department of Nuclear Medicine, University Hospital of Patras, Patras, Greece
Videosurgery Miniinv 2022; 17 (4): 641–651
DOI: https://doi.org/10.5114/wiitm.2022.116406
Online publish date: 2022/05/24
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Introduction
The diagnostic and therapeutic approach to axillary lymph nodes is considered indispensable in the treatment of breast cancer patients.

Aim
To investigate the effectiveness of 3D freehand SPECT (fhSPECT) in sentinel lymph node (SLN) mapping in breast cancer, compared with the use of a conventional gamma probe.

Material and methods
We retrospectively compared the fhSPECT lymph node mapping modality, with gamma probe detection in early-stage, clinically node-negative breast cancer patients, with biopsy-confirmed malignancy. The two techniques were compared based on the average number of LNs excised per axilla. The duration of SLN mapping was also compared between the two groups. The performance of the two methods on obese and post-systemic therapy patients was evaluated. FhSPECT was used in 150 cases, while the gamma probe was employed in 50 cases.

Results
FhSPECT detected at least 3 nodes in 83.3% of the patients vs. 72.0% with the γ-probe (p = 0.107). The mean number of SLNs excised per axilla was 3.66 using the γ-probe and 4.18 with fhSPECT (p = 0.03). The average surgical time was 39 ±7 min with the γ-probe and 37.54 ±17 min with fhSPECT (p = 0.228). Sentinel lymph node biopsy (SLNB) mean surgical time evolved from 40.2 ±20.77 min to 32.35 ±10.46 min (p = 0.033). In obese patients, a reduction in surgical times was noted from 45.5 ±3.09 min to 44.04 ±20.9 (p = 0.27), in addition to a significant increase in average LN detection in the fhSPECT group (4.26 ±1.44) compared to the γ-probe group (3.2 ±1.65) (p = 0.043).

Conclusions
The use of the fhSPECT modality is effective and safe, and, when compared to the γ-probe, has significant advantages in SLN mapping.

keywords:

breast cancer, early stage, sentinel lymph node biopsy, freehand SPECT
  
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