Grigorios Kaltsas ENDOCRINOLOGIST Consultant Physician in Internal Medicine Endocrinology Diabetes Melli-tus Metabolism

PhD: High frequency and low amplitude Gonadotropin pulsation in women with ‘Polycystic Ovarian Syndrome’. National & Kapodistrian University of Athens, Greece

• Hellenic Endocrine Society (HEE)
• European Society Endocrinology (ESE)
• European Neuorendocrine Association (ENEA)
• European Neuroendocrine Tumor Society (ΕΝΕΤS)
• European Network Study Adrenal Tumors (ENSAT)
• European Histiocyte Society (HistioNET) International Society of Endocrinology (ISE)
• European Society of Medical Oncology (ESMO)

Professional Societies & Organizations membership

• Member of the Advisory Board of the European Society of Neuroendocrine Tumors (ENETS). Member of the Educational Committee of ENETS. Lead of the Multiple Endocrine Neoplasia type 1 (MEN1) of ENETS Task Force. From 2024 member of the Executive Committee of ENETS, Chair of ENETS Centers of Excellence
• Member of the Executive Committee of the European Association of Neuroendocrinology (ENEA) up to 2018 Elected   member   of    the    Executive Committee   of the International Society of Endocrinology (ISE) – 2018-2022
• Member of Educational Committee ESMO (2021-onwards)
• Member of the Executive Committee of ESE (2024 onwards), Chair of the Education Committee of ESE
• Member of the HistioNEt. Contribution in the writing of Guidelines for Neuroendocrine Tumors, Pituitary Tumors and Langerhan’s Cell Histiocytosis (HistioNET)

Editorial Boards

• Endocrine Related Cancer
• Journal of Clinical Endocrinology and Metabolism
• Cancers (Basel)
• Journal of Neuroendocrinology
• Hormones

Associate Editor

• Neuromodulation (up to 2010)
• European Journal Clinical Investigation (up to 2018)
• Neuroendocrinology (up to 2020)
• Hormones (currently serving)
• ENDOTEX (Adrenal Section)
• Journal of Neuroendocrinology (2020 – onwards)

AD-HOC REVIEWER for peer-reviewed international journals

European Journal of Endocrinology, Journal of Clinical Endocrinology and Metabolism, Hormones, Endocrine Related Cancer, Journal of Neuroendocrinology, Metabolism, Journal of Endocrinological Investigation, ESMO Open

Education Experience

• 2005-onwards: Assistant, Associate, Full Professor Endocrinology & Internal Medicine, National and Kapodistrian University of Athens, Greece. April 2016-April 2017. Consultant in General Medicine-Endocrinology-Diabetes, Endocrine Departments at Oxford University (Churchill Hospital) and University Hospital Coventry and Warwickshire, UK as a
• 2001-2005: Consultant Endocrinologist, George Gennimatas Hospital, Athens, Greece
• 1996 – 2001: Senior Registrar Department of Endocrinology, St Bartholomew’s Hospital, Queen University, London, UK,
• December 1990-December   1994:   Trainee   in   General   Medicine    – Endocrinology – Diabetes, North Middlesex & Middlesex Hospital, London, UK (Affiliated Hospitals with Hospital, University College London, UK), & St Bartholomew’s University Hospital, London, UK
• June 1988-Νovember 1990: Trainee in General Medicine, 251 General Hospital, Athens, Greece

Clinical Interest: Neuroendocrinology, Pituitary tumors, Neuroendocrine tumors, Adrenal tumors, Thyroid – parathyroid tumors, Paragangliomas, Inherited Syndromes

Research Interest: Endocrine Oncology, Pituitary pathology, Adrenal pathology

Coventon Award, Barts and the London School of Medicine, Queen Mary’s University, UK

Editor in scientific books (n=9)

Author in book chapters (n=45)

Contribution in 30 International and 15 Hellenic Books

Number of articles: 420 (pubmed)

Number of citations: 34897 (Google Scholar),

h-index: 94 (Google Scholar)

• Cycle characterisation and clinical complications in patients with cyclic Cushing’s syndrome: insights from an international retrospective cohort study. Nowak E, Zhang Q, Zhang S, Zhao Y, Ye H, Machado MC, Moises CCS, Tóth M, Stark J, Yuen KCJ, Gurnell M, MacFarlane J, McCormack A, Govinna M, Gilis-Januszewska A, Minasyan M, Bonaventura I, Czepielewski MA, Ferriere A, Gadelha M, Isidori AM, Kastelan D, Maiter D, Tabarin A, Alexandraki KI, Chang J, Frontera ED, Hanzu FA, Matikainen N, Miljic D, Pichler R, Popovic V, Spencer-Segal JL, Tordjman K, Akirov A, Araujo-Castro M, Arvat E, Bancos I, Bioletto F, Burman P, Castinetti F, Detomas M, Fassnacht M, Feelders RA, Fountas A, Igaz P, Ilic S, Isand K, Kaltsas G, Meyer G, Parasiliti-Caprino M, Newell-Price J, Ragnarsson O, Valassi E, Vila G, Wass J, Yoel U, Fleseriu M, Reincke M.Lancet Diabetes Endocrinol. 2025 Dec;13(12):1030-1040. doi: 10.1016/S2213-8587(25)00249-9. Epub 2025 Oct 23.
• Controversies in NEN: An ENETS position statement on the treatment of patients with Grade 3 well-differentiated neuroendocrine tumours of the gastro-enteropancreatic tract. McNamara MG, Sorbye H, Begum N, Christ E, Fazio N, Fernandez-Cuesta L, Garcia-Carbonero R, Kaltsas G, Kasajima A, Salazar R, Speel EJM, Kjaer A.J Neuroendocrinol. 2025 Dec;37(12):e70080. 
• Update in the Management of ACTH-Secreting Gastroenteropancreatic and Thoracic Neuroendocrine Neoplasms. Tsoli M, Bel-Ange A, Atlan K, Ben-Haim S, Kaltsas G, Grozinsky-Glasberg S.Curr Treat Options Oncol. 2025 Nov;26(11):1010-1022. 
• Metabolic phenotype in non-aldosterone producing adrenal adenomas with co-existent polycystic ovary syndrome: a joint Ens@t project. Spyroglou A, Konstantakou P, Minnetti M, Altieri B, Nowak E, Papalexis P, Angelousi A, Vasiliadi D, Kimpel O, Macut D, Tucci L, Donnarumma F, Di Dalmazi G, Papaioannou T, Isidori A, Reincke M, Konstadoulakis M, Mastorakos G, Kaltsas G, Alexandraki KI.Endocrine. 2025. Nov;90(2):971-981.
• New Developments in VHL-Associated Neuroendocrine Neoplasms. Tsoli M, Panagaki M, Tasouli E, Kolomodi D, Kaltsas G.Curr Oncol Rep. 2025 Jan;27(1):59-67
• Bone and muscle mass characteristics in patients with gastroenteropancreatic neuroendocrine neoplasms. Aktypis C, Yavropoulou MP, Efstathopoulos E, Polichroniadi D, Poulia KA, Papatheodoridis G, Kaltsas G. 2025 Apr;88(1):348-358.
• Longitudinal Changes in Ki-67 Indices in Small-Intestinal Neuroendocrine Tumours and Their Impact on Survival. Daskalakis K, Tsoli M, Wedin M, Kos-Kudla B, Kogut A, Srirajaskanthan R, Clement DSVM, Giovos G, Weickert MO, Kaltsas G. 2025;115(5):402-
• Immunohistochemical expression of ephrin receptors in neuroendocrine neoplasms: a case-series of gastroenteropancreatic neuroendocrine neoplasms and a systematic review of the literature. Alexandraki KI, Papadimitriou E, Spyroglou A, Karapanagioti A, Antonopoulou I, Theohari I, Violetis O, Sotiropoulos GC, Theocharis S, Kaltsas GA. 2025 Mar;87(3):1323-1332. 
• Vaginal bleeding in women with ovarian neuroendocrine tumor metastases should not be overlooked. Angelousi A, Alexandraki K, Kassi E, Kaltsas G.Eur J Endocrinol. 2024 Nov 27;191(6):R5-R7.
  Hereditary Syndromes Associated with Pancreatic and Lung Neuroendocrine Tumors. Papadopoulou-Marketou N, Tsoli M, Chatzellis E, Alexandraki KI, Kaltsas G.Cancers (Basel). 2024 May 30;16(11):2075.