Background: The aim of the consensus approach was to improve the quality of care by agreement on definitions and standards, in order to harmonise lymphadenectomy during lung metastasectomy.
Methods: The Delphi process consisted of two rounds of anonymous voting before discussion at a consensus meeting to reach final consensus within a group of experts. Consensus was assumed when > 75% of the panel agreed.
Results: Of 76 invited experts (board certified thoracic surgeons leading high-volume thoracic departments), 49 and 47 participated in the first and second round questionnaire, respectively. 43 experts attended the consensus meeting and reached consensus on the following: surgical approach for solitary subpleurally located lung metastasis is videothoracoscopy compared to anterolateral thoracotomy for multiple lung metastases. Lymphadenectomy is performed irrespective of the surgical approach. Systematic lymphadenectomy or sampling are core elements of pulmonary metastasectomy for colorectal, renal and non-seminomatous testicular cancer. The size of pulmonary metastasis does not influence lymphadenectomy per se. Pulmonary metastasectomy is not abolished in case of intraoperatively detected lymph node metastases.
Conclusions: An expert group agreed on recommendations for lymphadenectomy during pulmonary metastasectomy using the Delphi process.