New data evaluate for surgeon volume
In an effort to address the concerns regarding surgical approach and expertise, the recently published study by Cusimano and colleagues uses population-based data from Ontario for all women undergoing radical hysterectomy for cervical cancer over a 10-year period from 2006 through 2016.5 The primary outcome was all-cause death, but the study also sought to address whether surgeon volume has an impact on recurrence rates for patients undergoing MH versus OH. To measure this impact the authors stratified surgeon characteristics by technique-specific volume and cervical cancer volume, splitting these volumes at the 50% percentile for low- and high-volume surgeons. They defined technique-specific volume as the number of simple and radical hysterectomies performed in the prior year using the selected approach (MH or OH). Cervical cancer volume was calculated as the number of hysterectomies of any type for cervical cancer in the previous 2 years. The technique-specific volume variable was subsequently re-categorized into tertiles, examined as a continuous variable, and analyzed at the 50th percentile for each year of the study.
Death and recurrence rates better in the OH group. The final cohort included 958 women that were relatively evenly split between MH and OH procedures. Results from their analysis show no difference in terms of all-cause death, cervical cancer–specific death, or recurrence. However, all 3 of these parameters were significantly different in favor of the OH group in women with Stage IB disease, which comprised over half of the overall cohort. Importantly, neither technique-specific volume nor cervical cancer volume had an effect on death or recurrence in Stage IB patients in any of the investigators’ analyses.
Important limitations. There are several limitations to this study that have to be taken into account before drawing any conclusions. Pathologic data were obtained from the database and did not include some important details about the tumor specimens (including specifying subgroups of Stage IA and IB disease, tumor size, presence of lymphovascular space invasion, and depth of stromal invasion). All of these details have been shown to be important prognostic variables in early-stage cervical cancer. Additionally, the MH group included a predominantly laparoscopic approach with only 10% of cases performed robotically, which again brings into question the generalizability of the data.
However, despite some of these shortcomings, the study authors do make a compelling argument that surgeon volume alone does not seem to play a significant role in cancer outcomes after MH.
With surgical approaches hard to compare, turn to careful patient counseling
Definitive assessment of the impact of surgical skill and experience on cervical cancer outcomes is probably an impossible task, as even a perfectly designed trial cannot entirely account for the intricacies of a complex surgical procedure. Variations in tumor characteristics and patient anatomy that affect operative decision making are not likely to be reflected when a patient’s outcome is plugged into a database. As a result, some surgeons and departments have turned to reporting personal or institutional recurrence rates for MH, which they believe may be a better representation of a patient’s risk in their hands. Meanwhile, many surgeons and groups have stopped performing MH altogether, largely due to the results of the LACC trial. Irrespective of final surgical route, it is important that the risks and benefits of both minimally invasive and open approaches be adequately discussed with patients so that they can make informed decisions regarding their own medical care.