Background: The Piver-Rutledge-Smith, and the Querleu-Morrow classifications defining types of hysterectomy recommend that the extent of radical excision should be increased with an increase in the extent of tumor invasion for early-stage cervical cancer. Although an increase in the resection range causes an increase in surgery-related complications, there is no clear evidence of whether it can contribute to the improvement of the prognosis. Thus, we performed this meta-analysis using relevant studies for investigating the association between the extent of radical excision and survival after hysterectomy for early-stage cervical cancer.
Methods: We searched studies which compared disease-free survival (DFS) or overall survival (OS) between type I or II (B) and type III (C) among 673 studies reported in Pubmed, Embase and Cochrane library till January 2022. In total, we used two randomized controlled trials and four observational studies including 1,010 patients with stage IB-IIB diseases in this meta-analysis. We compared DFS and OS as primary outcomes, and surgical outcomes, complications and the pattern of recurrence as secondary outcomes between the two groups.
Results: There were no differences in DFS and OS between the groups (hazard ratios [HRs], 0.812 and 0.607; 95% confidence intervals [CIs], 0.543 to 1.213 and 0.359 to 1.026). When we compared them between type II (B) and type III (C), there were also no differences in DFS and OS (HRs, 0.810 and 0.605; 95% CIs, 0.539 to 1.215 and 0.324 to 1.130; Figure 1). Operation time and hospitalization were shorter and blood loss and the rate of bladder dysfunction were less (standard difference in means, -1.213, -0.794, -1.010 and -0.855; 95% CIs, -1.360 to -1.065, -0.991 to -0.597, -1.170 to -0.850 and -1.233 to -0.558) in type I or II (B) hysterectomy (Figure 2). However, there were no differences in the number of transfusion, complications such as ileus, urinary tract fistula, lymphocysts, lymphedema, deep vein thrombosis, ureteral injury, hydronephrosis, stress urinary incontinence, and the pattern of recurrence between the two groups.
Conclusions: This meta-analysis shows that type I or II (B) hysterectomy may have the similar survival benefit to type III (C) hysterectomy for early-stage cervical cancer with an improvement of surgical outcomes and bladder dysfunction.