70. Invited discussion Forum on: “Real world evidence data in AIT – what does it bring to us?”. Rhinology Future Debates. Brussels, Belgium, December 8, 2017.

69. Invited discussion Forum on: “Positioning Dymista in AR treatment”. Rhinology Future Debates. Brussels, Belgium, December 8, 2017.

68. Invited discussion Forum on: “Nasal Turbinate as therapeutic target”. Rhinology Future Debates. Brussels, Belgium, December 8, 2017.

67. Lecture on: “Comparison of Laser CO2, Radiofrequences and cauterization in inferior turbinate surgery”, Round Table on: “Turbinate Surgery”. 4thCongress of the European ORL-HNS. Barcelona, Spain, October 7-11, 2017.

66. Lecture on: “Stem cell transplantation to the olfactory mucosa”, Round Table on: “Smell and Taste disorders”. Rhinology World Congress. Hong Kong, China, September 1-3, 2017.

65. Lecture on: “Allergy & Polyps”, Round Table on: “Nasal Polyposis: From basic science to new emerging therapy”. 21st World Congress of the International Federation of Otorhinolaryngological Societies. Paris, France, June 24-28, 2017.

64. Keynote Lecture on: “The use of Stem Cells in Rhinology”. Yong Loo Lin School of Medicine, National University of Singapore. Singapore, November 25, 2016.

63. Keynote Lecture on: “Where we stand? How to Treat SCUAD Patients with Pharmaceutical or Surgical Interventions? Updated Information Based on Phenotypes and Endotypes in European Countries”. ΙX International Symposium on Recent Advances in Rhinosinusitis & Nasal Polyposis. Kuala Lumpur, Malaysia, November 21-23, 2016.

62. Lecture on: “Hygiene Hypothesis and its application to handle allergic disease”. ΙX International Symposium on Recent Advances in Rhinosinusitis & Nasal Polyposis. Kuala Lumpur, Malaysia, November 21-23, 2016.

61. Lecture on: “Dealing with Rendou Osler Weber”. ΙX International Symposium on Recent Advances in Rhinosinusitis & Nasal Polyposis. Kuala Lumpur, Malaysia, November 21-23, 2016.

60. Lecture on: “Uncontrolled disease in Rhinology”, Round Table on “Nasal Polyposis, research update and clinical information”. ΙX International Symposium on Recent Advances in Rhinosinusitis & Nasal Polyposis. Kuala Lumpur, Malaysia, November 21-23, 2016.

59. Lecture on: “Different types of vasculitis”, Round table on: “GPA and other vasculitis diseases in the nose”. 26th Congress of the European Rhinologic Society. Stockholm, Sweden, July 3-7, 2016.

58. Lecture on: “Pediatric Severe Upper Airway Disease”, Round Table on: “Pediatric Allergy & Immunology”. 13th Congress of the European Society of Pediatric Otorhinolaryngology. Lisbon, Portugal, June 18-21, 2016.

57. Lecture on: “SCUAD in adult and pediatric patients”, Round table on: “Difficult inflammatory situations and associated comorbidities in CRS”. OASSIS II, 2nd Oceanic-American Sinus/Skull Base Interactive Symposium. Atlanta GA, USA, May 5-7, 2016.

56. Lecture on: “Uncontrolled Disease in Rhinology”. 10th Shimane International Seminar in Otorhinolaryngology. Matsue, Japan, October 4, 2015.

55. Lecture on: “SCUAD in Pediatric and Adult Population”. International Session 3. 54th Annual Meeting of the Japanese Rhinologic Society. Hiroshima, Japan, October 1-3, 2015.

54. Lecture on: “Introduction to SCUAD”, Round table on: “SCUAD and Chronic Rhinosinusitis”. 3rd Congress of European ORL-HNS. Prague, Czech Republic, June 7-11, 2015.

53. Lecture on: “Different Modes in Turbinate Surgery”, Round table on: “Turbinate Surgery”. 3rd Congress of European ORL-HNS. Prague, Czech Republic, June 7-11, 2015.

52. Lecture on “Severe Chronic Upper Airway Disease”. Session 11. 2nd Shiraz Rhinology International Course. Shiraz, Iran, April 14-17 2015.

51. Lecture on: “SCUAD in children”. Session 3. 8th Alpine Nasal Course. Crans Montana, Switzerland, January 24-28, 2015.

50. Lecture on: “SCUAD”. Interactive Round Table on; “Severe Chronic Upper Airway Diseases including Lower Airway”. 25th Congress of the European Rhinologic Society. Amsterdam, The Netherlands, June 22-26, 2014.

49. Lecture on: “Case 3”. Round table on: “My worse cases in rhinoplasty”. 4th Excellence in Rhinoplasty Course. Leuven, Belgium, March 19-21, 2014.

48. Lecture on: “Interactive cases and videos. 4th Excellence in Rhinoplasty Course. Leuven, Belgium, March 19-21, 2014.

47. Lecture on: “Nasal aesthetics in relation to the face”. Round table on: “Basic preoperative considerations”. 4th Excellence in Rhinoplasty Course. Leuven, Belgium, March 19-21, 2014.

46. Lecture on: “Outcome of sinus surgery in children”. Workshop V. VII International Symposium on recent advances in rhinosinusitis and nasal polyposis. Matsue, Japan, October 4-6, 2013.

45. Lecture on: “Hygiene Hypothesis and Chronic Rhinosinusitis”. Workshop IV. VII International Symposium on recent advances in rhinosinusitis and nasal polyposis. Matsue, Japan, October 4-6, 2013.

44. Lecture on: “Symmetry of the face and beauty”, Round table on “Face”. 36th Annual Conference of the European Academy of Facial Plastic Surgery. Oslo, Norway, August 29-September 1, 2013.

43. Lecture on: “Comparison of Carbon Dioxide Laser, Radiofrequency and Electrocautery for inferior turbinate reduction”, Round table on: “All about nasal turbinates”. 20th World Congress of the International Federation of Otorhinolaryngological Societies. Seoul, Korea, June 1-5, 2013.

42. Lecture on: “Clinical implications of the Hygiene Hypothesis”, Round table on: “Mucosal immunity of the nasopharynx and its clinical impact. 24th Congress of the European Rhinologic Society. Toulouse, France, June 17-21, 2012.

41. Interactive case presentation with panel discussion. 3rd Excellence in Rhinoplasty Course. Leuven, Belgium, March 14-16, 2012.

40. Lecture on: “The nose, face and beauty”. Round table on: “Basic preoperative considerations”. 3rd Excellence in Rhinoplasty Course. Leuven, Belgium, March 14-16, 2012.

39. Lecture on: “Hygiene Hypothesis and TLRs in Nasal Disease”, Round table on; “Roll of Toll-like Receptors in the Pathogenesis of Sinonasal Inflammation”. 14th Congress of the International Rhinologic Society. Tokyo, Japan, September 20-23, 2011.

38. Honorary invited lecture on: “Stem Cell Transplantation to the Olfactory Mucosa”. 9th Shimane International Seminar in Otorhinolaryngology. Matsue, Japan, September 17, 2011.

37. Lecture on: “Symmetry, beauty and the face”. Round Table on; “Nose: Preoperative”. 34th Annual Conference of the European Academy of Facial Plastic Surgery. Bruges, Belgium, September 1-4, 2011.

36. Meet the experts lecture on: “Dealing with nasal blockage”. XXX Congress of the European Academy of Allergy and Clinical Immunology. Istanbul, Turkey, June 11-15, 2011

35. Lecture on: “Evaluation of nasal patency”. Postgraduate Course on; “Rhinology”. XXX Congress of the European Academy of Allergy and Clinical Immunology. Istanbul, Turkey, June 11-15, 2011.

34. Workshop on: “Nasal manifestation of systemic diseases”. 23rd Congress of the European Rhinologic Society, combined with the 29th International Symposium of Infection & Allergy of the Nose. Geneva, Switzerland, June 20-24, 2010.

33. Lecture on: ”Treatment of benign positional vertigo”. 7th Aegean Meeting on Neurologic Therapeutics. Heraklio, Crete, Greece, May 27-28, 2011.

32. Lecture on: “Stem Cell Transplantation for Olfactory Disorder”. 4rd Alpine Instructional Course in Rhinology, Endoscopic Sinus Surgery, and Septorhinoplasty. Crans Montana, Switzerland, January 22-26, 2011.

31. Lecture on: “Frequent difficulties in Rhinoplasty”. 5th Bodrum Rhinocamp, Bodrum, Turkey, May 26-30, 2010.

30. Lecture on ”Septal Trimming with Laser”. 1nd Belgian Rhinologic Society Meeting. Bruges, Belgium, April 23-24, 2010.

29. Honorary invited lecture on: “The Use of Ligasure Vessel Sealing System (LVSS) in Head and Neck Surgery”. Refereeravont of the ENT Board of Leuven. Leuven, Belgium, March 11, 2010

28. Honorary Invited lecture on: “Benign Paroxysmal Positional Verigo”. Refereeravont of the ENT Board of Leuven. Leuven, Belgium, March 11, 2010.

27. Invited lecture on: “Laser Septochondrocorrection”. 3rd Alpine Instructional Course in Rhinology, Endoscopic Sinus Surgery, and Septorhinoplasty. Crans Montana, Switzerland, January 16-20, 2010.

26. Invited lecture on: “The Pathophysiology of the Hygiene Hypothesis”. University of Pittsburgh Alumni Day. Allergy, Asthma and Sinus Update. Pittsburgh PA, USA, April 3-4, 2009.

25. Invited lecture on: “Laser Septoplasty”. University of Pittsburgh Alumni Day. Allergy, Asthma and Sinus Update. Pittsburgh PA, USA, April 3-4, 2009.

24. Honorary invited lecture on: “The history of topical and nebulizer therapy for sinonasal inflammatory diseases in Greece. From Hippocrates up to now.” 32nd Annual Meeting of Japan Society for Aerosols in Medicine, combined with the 38th Annual Meeting of Japan Society for Infection in Otorhinolaryngology. Matsue, Shimane, Japan, September 4-6, 2008.

23. Lecture on: “Rhnitis Medicamentosa. Does it exist?” Round table on; “Adverse effects of topical medical treatment in allergic rhinitis”. 22nd Congress of the European Rhinologic Society, combined with the 27th International Symposium of Infection & Allergy of the Nose. Hersonissos, Crete, Greece, June 15-19, 2008.

22. Lecture on: “New therapeutic approaches in treating allergic rhinitis.” 1st Scientific Meeting of the Pathophysiology of Allergic Diseases and modern Therapeutic Approaches. Constantinople, Turkey, May 16-18, 2008.

21. Lecture on: “Laser in septal surgery”. Belgian Rhinologic Society Inauguration. Bruges, Belgium, April 12, 2008.

20. Lecture on: “Laser septochondrocorrection”. Round table on; “Update: What are the future directions for rhinologic research? Can we identify any realistic goals? What are they?” 12th Congress of the International Rhinologic Society, Venice, Italy, December 5-9, 2007.

19. Lecture on: “The immunological basis of Hygiene-Hypothesis on the inflammatory diseases of the upper respiratory tract”. Round Table on; “Mucosal immunology and its clinical application.” 21st Congress of the European Rhinologic Society. Tampere, Finland, June 11-15, 2006.

18. Instructional Course on: “Disease of the external auditory canal”, 2nd Instructional Workshop of the European Academy of Otology & Neuropotology, Nice, France, 21-24 October, 2004.

17. Instructional Course on: “Chronic Otitis Media”, 2nd Instructional Workshop of the European Academy of Otology & Neurotology, Nice, France, 21-24 October, 2004.

16. Lecture on: “Cartilage shaping. Implications”. 5th European Congress of Otolaryngology-head and Neck Surgery. Rodos-Kos, Greece, 11-16 September, 2004.

15. Instructional course on: “Deep neck infections: anatomy, etiology, diagnosis, clinical manifestations”. 5th European Congress of Otolaryngology-head and Neck Surgery. Rodos-Kos, Greece, 11-16 September, 2004.

14. Lecture on: “Multispectral imaging in Otolaryngology”. 5th European Congress of Otolaryngology-head and Neck Surgery. Rodos-Kos, Greece, 11-16 September, 2004.

13. Lecture on: “Future development and direction of research in Otolaryngology”. 5th European Congress of Otolaryngology-head and Neck Surgery. Rodos-Kos, Greece, 11-16 September, 2004.

12. Lecture on: “Medical management of acute rhinosinusitis in adults and children”. 5th European Congress of Otolaryngology-head and Neck Surgery. Rodos-Kos, Greece, 11-16 September, 2004.

11. Lecture on: “The Minoan Ear”. 5th European Congress of Otolaryngology-head and Neck Surgery. Rodos-Kos, Greece, 11-16 September, 2004.

10. Lecture on: “Lasers in the nose with a special emphasis in laser cartilage reshaping”. 20th Congress of the European Rhinologic Society. Istanbul, Turkey, June 18-25, 2004.

9. Seminar on: “Rhinosinusitis in children. New treatment and therapeutic data”. 20th Congress of the European Rhinologic Society. Istanbul, Turkey, June 18-25, 2004.

8. Panel on: “Chronic rhinosinusitis and endoscopic sinus surgery in young children” 20th Congress of the European Rhinologic Society. Istanbul, Turkey, June 18-25, 2004.

7. Allergic Rhinosinusitis in children. Pathophysiology. 6th International Conferrence on Pediatric Otorhinolaryngology. Athens, Greece, May 16-19, 2004.

6. Minimal Invasive Sinus Technique – Λειτουργικές επεμβάσεις σε χρόνια παραρρινοκολπίτιδα. Επιστημονική ημερίδα με θέμα: «Ρινίτιδες – Παραρρινοκολπίτιδες σε παιδιά και ενήλικες. Νεώτερα δεδομένα.» Χανιά 4 Απριλίου 2004.

5. The impact of Laser technology in the progress of Otolaryngology and beyond. ILLA / LTL ‘2003 International Conference and Symposium in Laser Technology and Lasers. Plovdiv, Bulgaria, September 27-October 1, 2003.

4. Otolaryngology in the Greco-Roman era. The XVIIth World Congress of The International Federation of Oto-Rhino-Laryngological Societies (IFOS). Cairo, Egypt 28th Sept-3 Oct., 2002.

3. Lecture on: “Internet in Otorhinolaryngology”. 2nd World Congress of Otolaryngologic Allergy Endoscopy and Laser Surgery. Athens, June 20-23, 2001.

2. Lecture on: “Laser tympanotomy in children”. Round Table in; “Professional Hearing Loss” 2nd World Congress of Otolaryngologic Allergy Endoscopy and Laser Surgery. Athens, June 20-23, 2001.

1. Applications of multispectral imaging in Otolaryngology Seminar on Otology and Neuro-Otology. 3-d Video seminar, Cadaver dissection, May 2001 Stara Zagora, Bulgaria.