The need for randomized trials in mesothelioma: let's walk the talk

Pulmonary metastasectomy: a call for better data collection, presentation and analysis

A systematic review of the literature for outcomes in pulmonary metastasectomy has revealed the variability in reporting and the paucity of data that would allow a clear understanding of the effectiveness of this operation. The authors, a surgeon and a mathematician, start from the experience of assessing the evidence on which the practice of pulmonary metastasectomy is based and give some simple examples on a more adequate approach to the collection and analysis of surgical data and the importance of its correct interpretation. Retrospective data analysis is constrained by the availability of data. While this can give insight on certain aspects, it is important to discern what data are necessary to give a complete understanding of the effectiveness of a practice. Typically well designed prospective studies and randomised controlled trials with a pre-specified data collection plan give more complete, consistent and reliable data than follow-up or retrospective studies. Pulmonary metastasectomy lends itself well as an example of practice based on uncertain evidence and biased reporting. All the available published studies are follow-up studies, there is no randomised controlled trial, so no control data to estimate its treatment effect on patient's survival. The pool of colorectal or sarcoma patients from which patients are selected to have a pulmonary metastasectomy is never reported on, thus it is hard to estimate the degree of selection and the influence of the surgeon's decision.

Pulmonary Metastasectomy in Colorectal Cancer (PulMiCC International)

SUMMARY Pulmonary Metastasectomy in Colorectal Cancer (PulMiCC) is a randomized controlled trial. Patients with resected colorectal cancer found to have one or more pulmonary metastases are randomized to have a metastasectomy or not. Both arms include active monitoring. Patients considered possible candidates for pulmonary metastasectomy are asked to first give consent to be assessed according to protocol after which a decision to have or not have metastasectomy may be made. If there is uncertainty, patients are invited to consent to randomization, including minimization for known prognostic factors: the number of metastases, the interval since primary resection, carcinoembryonic antigen levels and the TNM stage of the primary cancer. The primary outcomes are survival and quality of life. The trial is open in England, and in Serbia and Italy as PulMiCC International.