Tumor histology and survival after minimally invasive radical hysterectomy for early-stage cervical cancer: a systematic review and meta-analysis

Abstract

Objectives: A recent randomized controlled trial of minimally invasive (MIS) radical hysterectomy versus open surgery for early-stage cervical cancer has demonstrated higher recurrence and lower survival with MIS. However, given the lower operative morbidity of MIS, multiple groups have attempted to define subgroups of patients who may be able to undergo laparoscopic or robotic radical hysterectomy safely in retrospective cohort studies. Methods: We conducted a systematic review and meta-analysis of cohort studies and randomized controlled trials from 1990 to 2020 comparing MIS radical hysterectomy to open radical hysterectomy in early-stage cervical cancer (PROSPERO 2020 CRD42020173600). Cancer histology, laparoscopic or robotic approach, and overall survival (OS), progression-free survival (PFS), and recurrence rate were recorded for each study. We conducted a random-effects meta-analysis with inverse-probability weighting. Results: 41 studies including 22,593 unique women (10,686 MIS, 47%) were eligible for analysis; 6 reported outcomes by histology. Squamous cell carcinoma was the most common histology (79%). For adenocarcinoma, meta-analysis of 3 studies no differences in recurrence (RR 0.87, 95% CI 0.41-1.85), PFS (RR 0.98, 95% CI 0.07-1.89), or OS (RR 1.41, 95% CI 0.56-2.27) between open and MIS surgery. For SCC, two studies showed no change in PFS, and one large study reported decreased OS (HR 1.65, 95% CI 1.17-2.33). One small study found no difference in PFS or OS for neuroendocrine tumors of the cervix. One large study showed decreased OS with robotic versus open radical hysterectomy (HR 1.61, 95% CI 1.2-2.2), but no difference with laparoscopic versus open surgery (HR 1.50, 95% CI 0.97-2.3). Download : Download high-res image (132KB) Download : Download full-size image Conclusions: This meta-analysis contributes to examination of current evidence on surgical approach to early-stage cervical cancer. Our results suggest that there is no histological group for which MIS radical hysterectomy is superior to open radical hysterectomy, and equivalent to inferior outcomes with robotic or conventional laparoscopic surgery versus open surgery. Subgroup analysis generally showed equivocal or inferior outcomes with MIS compared to open surgery, though results remain limited by sample size.