Indocyanine Green and Methylene Blue Dye Guided Sentinel Lymph Node Biopsy in Early Breast Cancer: A Single-Center Retrospective Survival Study in 1574 Patients.

BACKGROUND

Currently, the standard tracing method is to use blue dyes and radioisotope as the tracer for sentinel lymph node biopsy (SLNB). However, there are variations in the choice of tracer in different countries and regions. Some new tracers are also gradually applied in clinical practice, but there is still a lack of long-term follow-up data to confirm their clinical application value.

PATIENTS AND METHODS

Clinicopathological and postoperative treatment follow-up data were collected from patients with early-stage cTis-2N0M0 breast cancer who underwent SLNB using a dual-tracer method of ICG combined with MB. Statistical indicators including the identification rate, the number of sentinel lymph nodes (SLNs), regional lymph node recurrence, disease-free survival (DFS) and overall survival (OS) were analyzed.

RESULTS

Among the 1574 patients, SLNs were successfully detected during surgery in 1569 patients, with a detection rate of 99.7%; the median number of SLNs removed was 3. A total of 1531 patients were included in the survival analysis, with a median follow-up of 4.7 (0.5-7.9) years. In total, patients with positive SLNs had a 5-year DFS and OS of 90.6% and 94.7%, respectively. The 5-year DFS and OS of patients with negative SLNs were 95.6% and 97.3%, respectively. The postoperative regional lymph node recurrence rate was 0.7% in patients with negative SLNs.

CONCLUSION

Indocyanine green combined with methylene blue dual-tracer method is safe and effective in sentinel lymph node biopsy in patients with early breast cancer.