Jean-Philippe Merlio, MD, PhD, Tumor Biology and Tumor Bank, CHU Bordeaux, Pessac, France, shares insights into challenges around the integration and comparison of studies in the field of cutaneous lymphoma due to differences in inclusion criteria. Prof. Merlio also comments on how genetics testing should be integrated into diagnosis. This interview took place at the EORTC Cutaneous Lymphoma Group 20-21 meeting in Marseille.