Objective: To evaluate the detection rate of at least one sentinel lymph node (SLN) in patients with early cervical cancer who underwent open radical hysterectomy or trachelectomy using indocyanine green (ICG) with the SPY Portable Handler Imager (SPY-PHI) system.
Methods: We retrospectively reviewed patients with cervical cancer FIGO 2018 stage IA1 with lymphovascular invasion up to stage IIIC1p who underwent SLN mapping and open radical hysterectomy or trachelectomy from March 2018 through August 2022 at The University of Texas MD Anderson Cancer Center. ICG was the only tracer used with the SPY-PHI system. Patient demographics, surgical approach, and tumor factors were analyzed. Overall detection, bilateral detection, and empty lymph node packet rates were determined.
Results: A total of 106 patients were included. Ninety-four (88.7%) patients underwent open radical hysterectomy and 12 (11.3%) open radical trachelectomy. Median age was 40 years (range, 23-71). Median body mass index was 28.8 kg/m (range, 17.6-48.4). The most common FIGO 2018 stages were IB1 (35%) and IB2 (30%). The most common histologic subtypes were squamous cell carcinoma (45%) and adenocarcinoma (45%). Most patients had grade 2 disease (61%) and no lymphovascular invasion (58%). Median tumor size was 1.8 cm (range, 0.3-4). Median number of detected SLN was 4 (range, 0-12). An SLN was identified during surgery in 104 patients (98%), with bilateral mapping in 94 (89%) and unilateral mapping in 10 (9%). The empty lymph node packet rate was 4 (3.8%). The external iliac (73%) was the most common site of SLN detection. Fourteen patients had positive lymph nodes (13.5%); 3 (21.4%) had macrometastases, 9 (64.3%) had micrometastases, and 2 (14.3%) had isolated tumor cells.
Conclusion: SLN mapping using ICG with the SPY-PHI system in open radical hysterectomy or trachelectomy is reliable and results in high overall and bilateral detection rates in patients with early cervical cancer.
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