Faculty Members

مواقع أعضاء هيئة التدريس

كل ما تحتاجه من أستاذك… في مكان واحد

Prof.GEORGIOS Charalambos no ZACHARAKIS

MBBS, BSc, MSc, PhD, EBGH Professor College of Medicine In Al Karj

Faculty members housing Prince Sattam bin Abdulaziz University Al Kharj 11942, KSA mob. Tel.: +966537005942 e-mail: g.zacharakis@psau.edu.sa
011-588-6810
g.zacharakis@psau.edu.sa

Curriculum Vitae
Publications

Education

BSc in Microbiology July 1994 MSc in Human Molecular Genetics Nov. 1995 MB BS (Medical Degree) July 2000 PhD (in Medicine) March 2005 Gastroenterology (European Board) March 2010

Research Interests

Artificial intelligence in Colorectal cancer screening and adenoma detection rate
Advanced Therapeutic Endoscopy
Gastrointestinal Functional Diseases
Helicobacter Pylori infection and Dyspepsia
Hepatology

Experience

2011 - 2015 - Professor - University of Nicosia, Cyprus
2015 - until now - Professor - PSAU

Responsibilities

Supervisor of Endoscopy Unit, Department of Internal Medicine, PSAUH Supervisor of research teams inside and outside KSA Teaching (lectures, bedside teaching, seminars)

Publications

1. Al Masoud A, Zacharakis G, Al-Robayan A, Al-Meghaiseeb, Al-Amro R, Ghazal H, et al. Endoscopic retrograde cholangiopancreatography of geriatric patients with cholangitis: A single-center experience in central Saudi Arabia. Saudi J Gastroenterol. 2025. doi:10.4103/sjg.sjg_205_25
2. Albadrani A, Zacharakis G, Alqahtani MS, AlHarbi A, Alkudam A, Bawazir A, et al. A longitudinal study of premalignant gastric lesions and early onset gastric cancer among young adults in central Saudi Arabia. Curr Oncol. 2025;32(8):428. doi:10.3390/curroncol32080428
3. Zacharakis G, Dahale A, Elbary ER, Babikir RR, Alla MA, Mustafa MO. Factors associated with precancerous stomach lesions and progression: A 7-year multi-center prospective cohort study on the low incidence of gastric cancer in central Saudi Arabia. Saudi J Gastroenterol. 2024;30(4):181-97. doi:10.4103/sjg.sjg_172_24
4. Zacharakis G, Albadrani AA, Alqahtani MS. Gastric cancer prevention; detection of premalignant gastric lesions and surveillance for early detection of gastric cancer in low incidence countries. Gastroenterol Med Res. 2023;7(5):GMR.000671. doi:10.31031/GMR.2023.07.000671
5. Zacharakis G, Almasoud A, Arahmane O, Alzahrani J, Al-Ghamdi S. Epidemiology, risk factors for gastric cancer and surveillance of premalignant gastric lesions: A prospective cohort study of central Saudi Arabia. Curr Oncol. 2023;30:8338-51. doi:10.3390/curroncol30090605
6. Zacharakis G, Albadrani AA, Alhussain A, Khushbu A, Rashid A. An investigation into the state of the art and perspective for medical field in reference with artificial intelligence. J Pharm Negative Results. 2022;13(4):1564-71.
7. Zacharakis G, Almasoud A, Arahmane O, Aldossary K, Alzahrani J, Al-Ghamdi S, et al. A 5-year evaluation of early- and late-onset sporadic colorectal cancer screening in central Saudi Arabia. Saudi J Gastroenterol. 2022. doi:10.4103/sjg.sjg_333_22
8. Zacharakis G, Almasoud A, Aldossari K. Colorectal cancer screening challenges in Saudi Arabia: A comprehensive review article. Arch Med Sci Civil Dis. 2022;7:e24-32.
9. Zacharakis G, Almasoud A, Arahmane O, Ramadan M, Alzahrani J, Al-Ghamdi S, et al. Inflammatory bowel diseases in a central urban area, Riyadh Province Al-Kharj of Saudi Arabia: Epidemiology, clinical characteristics, natural course of disease and current clinical practice. Jpn J Gastroenterol Hepatol. 2022;9:1-8. doi:10.5281/zenodo.17127134
10. Zacharakis G, Almasoud A. Using of artificial intelligence: Current and future applications in colorectal cancer screening. World J Gastroenterol. 2022;28(24):2778-83.
11. Almutairi BF, Alsaygh KW, Altamimi MM, Alshammari AS, Alsomali AM, Alanazi SM, et al. Internalized weight stigma: Prevalence and association with psychiatric disorder among overweight and obese individuals. Cureus. 2021;13(10):e18577. doi:10.7759/cureus.18577
12. Zacharakis G, AlGhamdi S, AlZahrani J. Neuromodulators for functional dyspepsia—a gut-brain interaction disorder: Uptodate clinical practice. Gastroenterol Med Res. 2021;6(2):521-4.
13. Zacharakis G, Al-Ghamdi S, AlZahrani J, Almasoud A, Altuwaim A. Upper gastrointestinal tract involvement in the management of bariatric patients in the Kingdom of Saudi Arabia. Ann Gastroenterol. 2021;34(2):177-82.
14. Zacharakis G, Al-Ghamdi S, AlZahrani J, Almasoud A, Arahmane O, et al. Effects of the Rome IV criteria to functional dyspepsia symptoms in Saudi Arabia: Epidemiology and clinical practice. Korean J Gastroenterol. 2020;76(6):304-13.
15. Alanazi BG, Alanazi FH, Albriek AZ, Aldalbahi AM, Alburayk KB, Zacharakis G. The prevalence of Helicobacter pylori infection in patients with dyspepsia in the central rural region of Saudi Arabia. Indo Am J Pharm Sci. 2019;6(1):1358-64.
16. Zacharakis G, Aleid A, Aldossary KK. New and old biomarkers of hepatocellular carcinoma. Hepatoma Res. 2018;4:e1123.
17. Aldujayn MN, Almuaythir AS, Almousa OM, Alqahtani NT, Alhaqbani SM, Alshaalan FN, et al. A cross-sectional assessment of indications and findings of upper and lower gastrointestinal endoscopy in population of Al Kharj Province, KSA. Saudi J Med. 2018;3:487-92.
18. Zacharakis G, Alharbi MH, Alsalmi MM, Alotaibi SB, Algaradi YA, Alsadiq FN, et al. Prevalence of gastroesophageal reflux disease symptoms in Saudi Arabia. Int J Med Res Prof. 2018;4(1):21-7.
19. Zacharakis G, Al-Zahrani JM. Reactivation of hepatitis B virus during treatment of hepatitis C genotype 3 with daclatasvir and sofosbuvir in a patient with dual infection of hepatitis B and hepatitis C virus. Hepat Mon. 2018;18(1):e1253.
20. Zacharakis G, Al-Zahrani JM. Coinfection with hepatitis B and hepatitis C virus: New insights of treatment in the era of direct acting antivirals. Int J Adv Res. 2017;5(5):1928-37.
21. Manolakopoulos S, Zacharakis G, Zissis M, Giannakopoulos V. Safety and efficacy of daclatasvir in the management of patients with chronic hepatitis C. Ann Gastroenterol. 2016;29(3):282-96.
22. Gbandi E, Goulas A, Sevastianos V, Hadziyannis S, Panderi A, Koskinas J, et al. Common ABCB1 polymorphisms in Greek patients with chronic hepatitis C infection: A comparison with hyperlipidemic patients and the general population. Pharmacol Rep. 2016;68(2):476-82.
23. Papantoniou V, Valsamaki P, Skorda L, Papantoniou I, Delichas Z, Zacharakis G, et al. Technetium-99m labelled red blood cells scintigraphy and not iminodiacetic acid cholescintigraphy facilitates the discrimination of hepatic cirrhosis from fibrosis. Hell J Nucl Med. 2015;18(3):238-42.
24. Triantafyllou K, Viazis N, Tsibouris P, Zacharakis G, Kalantzis C, Karamanolis DG, et al. Colon capsule endoscopy is feasible to perform after incomplete colonoscopy and guides further workup in clinical practice. Gastrointest Endosc. 2014;79(2):307-16.
25. Zacharakis G, Viazis N, Karamanolis DG. Immune response to hepatitis B vaccine in patients who lost hepatitis B surface antigen during follow up. Hepat Mon. 2011;11(6):481-2.
26. Zacharakis G, Kotsiou S, Papoutselis M, Vafiadis N, Tzara F, Pouliou E, et al. Changes in the epidemiology of hepatitis B virus infection following the implementation of immunisation programmes in northeastern Greece. Euro Surveill. 2009;14(32):19297.
27. Koskinas J, Zacharakis G, Sidiropoulos J, Elefsiniotis J, Savvas S, Kotsiou S, et al. Granulocyte colony stimulating factor in HCV genotype-1 patients who develop Peg-IFN-α2b related severe neutropenia: A preliminary report on treatment, safety and efficacy. J Med Virol. 2009;81(5):848-52.
28. Zacharakis G, Koskinas J, Kotsiou S, Tzara F, Vafiadis N, Papoutselis M, et al. The role of serial measurement of serum HBV DNA levels in patients with chronic HBeAg(-) hepatitis B infection: Association with liver disease progression. A prospective cohort study. J Hepatol. 2008;49(6):884-91.
29. Koskinas J, Manesis EK, Zacharakis GH, Galiatsatos N, Sevastos N, Archimandritis AJ. Liver involvement in acute vaso-occlusive crisis of sickle cell disease: Prevalence and predisposing factors. Scand J Gastroenterol. 2007;42(4):499-507.
30. Zacharakis G, Koskinas J, Kotsiou S, Tzara F, Vafiadis N, Papoutselis M, et al. Natural history of chronic hepatitis B virus infection in children of different ethnic origins: A cohort study with up to 12 years’ follow-up in northern Greece. J Pediatr Gastroenterol Nutr. 2007;44(1):84-91.
31. Zacharakis G, Koskinas J, Papoutselis M, Tzara F, Vafiadis N, Papoutselis K, et al. Natural history of chronic HBV infection: A cohort study with up to 12 years follow-up in North Greece. Part of the Interrg I-II/EC-Project. J Med Virol. 2005;77(2):173-9.
32. Petrunov B, Kojauharova M, Teoharov P, Haidushka I, Sotirova P, Sredkova M, et al. EU project interreg II: seroepidemiology study on hepatitis C and B viral infections prevalence in Bulgaria and northern Greece. J Hepatol. 2002;36:138-9.
33. Laras A, Zacharakis G, Hadziyannis S. Absence of the negative strand of GBV-C/HGV RNA from the liver. J Hepatol. 1999;30:383-8.

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Prof.GEORGIOS Charalambos no ZACHARAKIS

Education

Research Interests

Experience

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Publications

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Links to official Saudi websites end with edu.sa

Government websites use the HTTPS protocol for encryption and security.

Faculty Members

Prof.GEORGIOS Charalambos no ZACHARAKIS

Education

Research Interests

Experience

Responsibilities

Publications

Administration of Public Relations and Media