Nikolaidis Georgios is an Oncologist - Mastologist with a private practice in Kalamaria, Thessaloniki. He holds a degree from the Université de Médecine et Pharmacie in France and obtained his specialty title in General Surgery at the General Hospital of Thessaloniki "Papageorgiou." He trained in Oncological Surgery, Breast Surgery, and Laparoscopic Surgery as an assistant surgeon at the same hospital. He continued his training at the General Hospital of Thessaloniki AHEPA as a scientific collaborator, where he currently delivers numerous lectures and trains medical students who have completed their third year of studies. He has extensive experience in the diagnostic and interventional use of breast ultrasound and is among the few surgeons in Greece certified in Advanced Laparoscopy by the Surgical Society of Northern Greece in collaboration with the 4th Surgical Clinic of Aristotle University. He has attended numerous seminars on diagnostic approaches and breast surgery throughout Greece and abroad. He has served in the Surgical Department of the Military Hospital of Xanthi, the Surgical Clinic of the General Hospital of Ptolemaida "Bodosakeio," the General Hospital of Kozani "Mamatseio," the Health Center of Siatista, and in the emergency surgery, minor procedures, and vascular surgery department of the "Papageorgiou" Hospital. Currently, he is a scientific collaborator at the University Hospital of Thessaloniki AHEPA and leads numerous oncological and other surgeries with a focus on breast cases at Euromedica General Clinic of Thessaloniki, the Private Clinic of Thessaloniki "Agios Loukas," as well as at Genesis Clinic Thessaloniki, where he is involved in the full spectrum of activities.