Dr. Emmanouil Panagiotou works at the Third Department of Internal Medicine, Sotiria Hospital, School of Medicine, National and Kapodistrian University of Athens in Athens, Greece. Dr. Panagiotou is the guest editor of the MDPI special issue “After Cancer Remission: Tracking Minimal Residual Disease and Relapse.” Dr. Panagiotou’s research interests mainly focus on the diagnosis and treatment of solid tumors, particularly lung cancer and breast cancer. Dr. Panagiotou’s scientific output includes 25 publications in various journals, with an h-index of 6 (Google Scholar, October 2025).