Δημήτριος Τσακαγιάννης ΧΕΙΡΟΥΡΓΟΣ Αναπληρωτής Διευθυντής Χειρουργικής Κλινικής Ομίλου ΥΓΕΙΑ

• American College of Surgeons
• American Medical Association
• SAGES (Society of American Gastrointestinal Endoscopic Surgeons)
• The Angiogenesis Inc. (U.S.A.)
• Harvard Medical Alumni Association
• Tufts Medical Alumni Association
• UMASS Medical Alumni Association
• General Medical Council (England)
• Ελληνοαμερικανική Ιατρική Εταιρεία

• Research Fellow, Πανεπιστήμιο Αθηνών, Ιατρική Σχολή, έδρα Φαρμακολογίας, 1989-1990 
• Ειδικότητα, 251 Γενικό Νοσοκομείο Αεροπορίας, Γενική Χειρουργική, 1990
• Research Fellow, Harvard Medical School, Boston, USA, Surgery, 1990-1991
• Resident in Surgery, Harvard Medical School, Boston, USA, Surgery,, 1993-1995
• Resident in Surgery, Tufts University Medical School, Boston, USA, Surgery, 1991-1993 
• Clinical and Research Fellow, Harvard Medical School, Boston, USA, Surgery, 1994-1995 
• Resident in Surgery, University of Massachusetts Medical School, Boston, USA, Harvard Medical School, Boston, USA, 1995-1996 
• Chief Resident Associate in Surgery, University of Massachusetts, Medical School, Boston, USA, 1996-1997

Κλινικό ενδιαφέρον:

• Λαπαροσκοπική χειρουργική (advanced) 
• Χειρουργική μαστού & ενδοκρινών αδένων 
• Χειρουργική ογκολογία

Ερευνητικό ενδιαφέρον:

• Αγγειογένεση και καρκίνος
• Πλέον σύγχρονη μορφή ελάχιστα επεμβατικής χειρουργικής που ονομάζεται RPLS (Reduced Port Laparoscopic Surgery)

• Ιδρυτικό μέλος της The Angiogenesis Inc. (U.S.A.)
• Πρόεδρος της Ελληνοαμερικανικής Ιατρικής Εταιρείας

• “Use of a diathermy system in theroid surgery”, Arch. Surgery, 139 (9): 997-1000, 2004, Kiriakopoulos A, Tsakayannis D, Linos D. 
• “Laparoscopic excision of bilateral primary adrenal leiomyosarcomas in a 14 year old girl with aquired immunodeficiency syndrome (AIDS)”, Surgery 136 (5): 1098-100, 2004, Linos D, Kyriakopoulos A, Tsakayannis D, Theodoridou M, Chroussos G. 
• “Metastatic adrenocortical carcinoma”, Adrenal glands, Linos D (ed), Springer 151-157, 2005, Tsakayannis D, Linos D 
• Laparoscopic management of a ruptured giant epidermoid splenic cyst. Kiriakopoulos A, Tsakayannis D, Linos D. JSLS 9(3):349-351, 2005 
• Effect of green tea on angiogenesis and severity of atherosclerosis in cholesterol-fed rabbit. Kavantzas N, Chatziioannou A, Yanni AE, Tsakayannis D, Balafoutas D, Agrogiannis G, Perrea D. Vascul Pharmacol. 44(6):461-3. Epub 2006 May 11, 2006. 
• Surgical management of adrenal myelolipoma: a series of 10 patients and review of the literature. Kiriakopoulos A, Tsakayannis D, Linos D. Minerva Chir. 61(3):241-6, 2006 
• Laparoscopic management of complicated appendicitis.Kiriakopoulos A, Tsakayannis D, Linos D. JSLS. 10(4):453-6, 2006 
• Reinforcement does not necessarily reduce the rate of staple line leaks after sleeve gastrectomy. A review of the literature and clinical experiences. Chen B, Kiriakopoulos A, Tsakayannis D, Wachtel MS, Linos D, Frezza EE.Obes Surg. 19(2):166-72, 2009
• Laparoscopic sleeve gastrectomy in morbidly obese patients. Technique and short term results. Kiriakopoulos A, Varounis C, Tsakayannis D, Linos D. Hormones.8(2):138-43, 2009 
• Adrenal ganglioneuromas: incidentalomas with misleading clinical and imaging features. Linos D, Tsirlis T, Kapralou A, Kiriakopoulos A, Tsakayannis D, Papaioannou D. Surgery. 149(1):99-105, 2011