George Malietzis is a Consultant General and Colorectal surgeon and a clinical lecturer in Surgery and Cancer at Imperial College, London.
He graduated from Athens, Greece in 2007 and then moved to the UK to undertake a master’s degree in Cancer Therapeutics at Barts and the London School of Medicine. This was followed by his foundation and core surgical training years. In 2015 he completed a PhD at Imperial College London and a PG degree in Medical Education. Since then, he holds the post of the clinical lecturer for Imperial College, London and has numerous publications in high index scientific journals. His research interest encompasses clinical and mechanistic studies of colorectal surgery, complex biostatistical models, networks, and evidence synthesis to guide policy decisions, novel health technology assessment and diagnostic accuracy of biomarkers.
He subsequently commenced his higher surgical training and completed it in Northwest London Deanery. His training included broad general surgical training with a focus on gastrointestinal surgery in busy district general hospitals as well as in London tertiary centres of excellence, like the Royal Marsden and St Mark's hospital. As such he has a wide range of experience in gastrointestinal surgery, emergency and elective general surgery.
He became a specialist general surgeon having been awarded the Certificate of Completion of Training (CCT) by the General Medical Council (GMC), after completing his surgical training and passing all the relevant exams (FRCS En). He was then appointed as a consultant colorectal surgeon at Chelsea and Westminster Hospital.
He endeavours to offer the highest standards of care for his patients across a spectrum of colorectal and gastrointestinal conditions including rectal bleeding, haemorrhoids, perianal fistula, inflammatory bowel disease, colorectal cancer, diverticular disease, abdominal pain, pelvic floor pathology and hernia. He has featured in national and international conferences and media to opine on colorectal conditions.
In the winter of 2021, he moved back to Cyprus to offer his services in Limassol.
George Malietzis
MBBS, PG Cert Med Ed, MSc, PhD, FRCS
CCT (UK)


-
Name
Dr. George Malietzis -
Titles
MBBS, PG Cert Med Ed, MSc, PhD, FRCS -
Posts
-General and Colorectal surgeon
-Clinical Lecturer Surgery and Cancer at Imperial College London -
E-mail
g.malietzis@medihospital.com.cy -
Appointment
25200218 -
Mobile
99941594 -
Address
Mediterrenean Hospital
9 Stigos
3117
Limassol

Dr. George Malietzis
MBBS, MSc, PHD, FRCS
-
Colorectal Surgery
Examples of conditions and operations include:
- Colon and Rectal Cancer Laparoscopic surgery
- Diverticular Disease
- Inflammatory bowel disease – Ulcerative colitis and Crohn’s
- Colitis of various aetiology
- Rectal Polyp cancer surgery – Transanal Minimally Invasive Surgery
- Anal cancer SCC
- Stoma problems
-
General and Emergency Surgery
Examples of conditions and operations include:
- Management of skin lesions and lumps such as lipomas, cysts and moles
- Lymph node biopsy
- Laparoscopic appendicectomy
- Laparoscopic cholecystectomy - Gallstones
- Small bowel resection for various pathologies
- Laparoscopic or open release of adhesions
- Diagnostic Laparoscopy
- Laparotomy for acute abdomen
- Abdominal Trauma management
-
Mobile
+357 99941594 -
Appointment
+357 25200218 -
Address
Mediterennean Hospital
9 Stigos
3117
Limassol
Education Qualifications
2007 |
Ptychio Iatrikes; University of Athens, Athens, Greece; MBBS equivalent |
2008 |
MSc in Cancer Therapeutics; Barts and the London School of Medicine, Queen Mary University |
2011 |
MRCS; Royal College of Surgeons England |
2015 |
PhD; Imperial College, London Title : “An investigation in host’s body composition and colorectal cancer outcomes” |
2015 |
PG Cert in Medical education; University of Hertfordshire |
2014 |
Fellow of Higher Educational Authority (HEA) |
2020 |
Fellow Royal College of Surgeons (FRCS); Royal College of Surgeons England |
2021 |
Certification of completion of training General Surgery (Colorectal) ; North West London Deanery |
Professional – Academic Experience
Current Posts
Previous Posts
Teaching Experience
Formal Teaching Posts Undergraduate and Postgraduate Level
Senior Teaching Fellow in General Surgery for Imperial College based at Northwick Park Hospital
Clinical Tutor for the postgraduate teaching term at St Mark's Hospital and Academic institute
Teaching in Courses
Faculty for the courses below:
Innovative Course Development
Formal Qualification
Research Work
Publications
Table of Published per review articles
|
Overall |
Original Work |
Letters to the editor |
Case Reports |
Total |
70 |
66 |
2 |
2 |
Total citations |
5696 |
|
|
|
h-index (Scholar) |
28 |
|
|
|
Selected Publications
- Malietzis G, Currie AC, Athanasiou T, Johns N, Anyamene N, Glynne-Jones R, Kennedy RH, Fearon KC, Jenkins JT. Influence of body composition profile on outcomes following colorectal cancer surgery. Br J Surg. 2016 Apr;103(5):572-80 PMID: 2700127
- Malietzis G, Currie AC, Johns N, Fearon KC, Darzi A, Kennedy RH, Athanasiou T, Jenkins JT. Skeletal Muscle Changes After Elective Colorectal Cancer Resection: A Longitudinal Study. Ann Surg Oncol. 2016 Mar 22. PMID: 27006127
- Malietzis G, Johns N, Al-Hassi HO, Knight SC, Kennedy RH, Fearon KC, Aziz O, Jenkins JT. Low muscularity and myosteatosis is related to the host systemic inflammatory response in patients undergoing surgery for colorectal cancer. Ann Surg. 2015 Jan 30. PMID: 25647064
- Malietzis G, Mughal A, Currie AC, Anyamene N, Kennedy RH, Athanasiou T, Jenkins JT. Factors Implicated for Delay of Adjuvant Chemotherapy in Colorectal Cancer: A Meta-analysis of Observational Studies. Ann Surg Oncol. 2015 Mar 17. [Epub ahead of print]. PMID: 25777086
- Malietzis G, Aziz O, Bagnall NM, Johns N, Fearon KC, Jenkins JT, The role of body composition evaluation by computerized tomography in determining colorectal cancer treatment outcomes: A systematic review, European Journal of Surgical Oncology 41 (2015), pp. 186-196, doi: 10.1016/j.ejso.2014.10.056. PMID: 25468746
- Malietzis G, Giacometti M, Kennedy RH, Athanasiou T, Aziz O, Jenkins JT. The emerging role of neutrophil to lymphocyte ratio in determining colorectal cancer treatment outcomes: a systematic review and meta-analysis. Ann Surg Oncol. 2014 Nov;21(12):3938-46. doi: 10.1245/s10434-014-3815-2. Epub 2014 May 28. PubMed PMID: 24866438.
- Malietzis G, Giacometti M, Askari A, Nachiappan S, Kennedy RH, Faiz OD, Aziz O, Jenkins JT. A preoperative neutrophil to lymphocyte ratio of 3 predicts disease-free survival after curative elective colorectal cancer surgery. Ann Surg. 2014 Aug; 260(2):287-92. doi: 10.1097/SLA.0000000000000216. PubMed PMID: 24096764.
- Malietzis G, Monzon L, Hand J, Wasan H, Leen E, Abel M, Muhammad A, Price P, Abel P. High-intensity focused ultrasound: advances in technology and experimental trials support enhanced utility of focused ultrasound surgery in oncology. Br J Radiol. 2013 Apr; 86(1024):20130044. doi: 10.1259/bjr.20130044. Epub 2013 Feb 12. Review. PubMed PMID: 23403455
- Malietzis G, Lee GH, Bernardo D, Blakemore AI, Knight SC, Moorghen M, Al-Hassi HO, Jenkins JT. The prognostic significance and relationship with body composition of CCR7-positive cells in colorectal cancer. J Surg Oncol. 2015 Jul;112(1):86-92. PMID: 26179425
- Malietzis G, Aziz O, Jenkins JT. Reply To Letter "Does Preoperative Neutrophil To Lymphocyte Ratio Predict Disease-Free Survival Rate In Colorectal Cancer Patients Undergoing Curative Surgery?" Ann Surg. 2015 Feb 2. PMID: 25647064
- Malietzis G, Lee GH, Jenkins JT, Bernardo D, Moorghen M, Knight SC, Al-Hassi HO. Prognostic Value of the Tumour-Infiltrating Dendritic Cells in Colorectal Cancer: A Systematic Review. Cell Commun Adhes. 2015 Feb;22(1):9-14. PMID: 26027852
- Malietzis G, Anyamene N, Jenkins JT. Muscle Monitoring and Maintenance as an End Point for Patients Treated for Cancer. Clin Oncol (R Coll Radiol). 2015 Aug; 27(8):479-81. PMID: 26004239
- Marschall D, Salciccioli J, Walton SJ, Pitkin J, Shalhoub J, Malietzis G. Medical Student Experience in Surgery Influences Their Career Choices: A Systematic Review of the Literature. J Surg Educ. 2014 Dec 24. pii: S1931-7204(14)00300-6
- Currie A, Malietzis G, Askari A, Nachiappan S, Swift P, Jenkins JT, Faiz OD, Kennedy RH. Impact of chronic kidney disease on postoperative outcome following colorectal cancer surgery. Colorectal Dis. 2014 Nov;16(11):879-85. doi:10.1111/codi.12665. PubMed PMID: 24836209.
- Ortiz ML, Kumar V, Martner A, Mony S, Donthireddy L, Condamine T, Seykora J, Knight SC, Malietzis G, Lee GH, Moorghen M, Lenox B, Luetteke N, Celis E, Gabrilovich D. Immature myeloid cells directly contribute to skin tumor development by recruiting IL-17-producing CD4+ T cells. J Exp Med. 2015 Feb 9. pii: jem.20140835. PMID: 25667306
- Currie AC, Malietzis G, Jenkins JT, Yamada T, Ashrafian H, Athanasiou T, Okabayashi K, Kennedy RH. Network meta-analysis of protocol-driven care and laparoscopic surgery for colorectal cancer. Br J Surg. 2016 Dec;103(13):1783-1794. doi: 10.1002/bjs.10306
- Markar SR, Mikhail S, Malietzis G, Athanasiou T, Mariette C, Sasako M, Hanna GB. Influence of Surgical Resection of Hepatic Metastases From Gastric Adenocarcinoma on Long-term Survival: Systematic Review and Pooled Analysis. Ann Surg. 2016 Jun;263(6):1092-101.
- Currie AC, White I, Malietzis G, Moorghen M, Jenkins JT, Kennedy RH. Outcomes following laparoscopic rectal cancer resection by supervised trainees. Br J Surg. 2016 Jul;103(8):1076-83. doi: 10.1002/bjs.10193. Epub 2016 May 11
National and International Conferences Proceedings
Table of National and International Presentations
|
Overall |
Oral Presentations |
Poster Presentations |
Total |
80 |
20 |
60 |
|
|
|
|
Selected Oral Presentations
Malietzis G et al; The Prognostic Significance of CCR7-Positive Cells and Relationship with Body Composition in Colorectal Cancer.
Conference: ASGBI, April 2015, Manchester, UK
Abstract; BJS
Malietzis G et al; Muscle Depletion Predicts Survival After Curative Elective Colorectal Cancer Surgery.
Conference: ASGBI, April 2015, Manchester, UK
Abstract; BJS
Malietzis G et al; Muscle Depletion is related to the host systemic inflammatory response in patients treated surgically for colorectal cancer.
Conference: ASGBI, April 2015, Manchester, UK
Abstract; BJS
Malietzis G, Currie AC, Nachiappan S, et al. Host body composition changes after elective colorectal resection for colorectal cancer: a longitudinal data analysis.
Conference: SARS, Durham January 2015, UK
Abstract; BJS
Malietzis G, Mughal A, Nachiappan S. et al. Factors implicated for delay of adjuvant chemotherapy in colorectal cancer; a meta-analysis of observational studies.
Conference: SARS Durham January 2015, UK
Abstract; BJS
Malietzis, G, Giacometti, M., Askari, A., et al. A preoperative neutrophil to lymphocyte ratio of three predicts disease-free survival after curative elective colorectal cancer surgery
Conference: ESCP September 2013, Belgrade, Serbia
Abstract; Colorectal Disease September 2013; 15 Suppl. 3:18
Malietzis, G, Giacometti, M., Kennedy, R., Jenkins, JT. Preoperative systemic inflammation is associated with reduced disease-free survival in ''traditional'' but not enhanced recovery care: does ERAS alter cancer outcome?
Conference: ASGBI April 2013, Glasgow, UK
Abstract; British Journal of Surgery August 2013; 100 Supp 7:57
Research projects
- An Investigation of Body Composition in Relation to Clinical Outcomes and Immune Response in Patients Undergoing Colorectal Cancer Surgery
- Body Composition manipulation in CoLorectal cancer – BICYCLE study
- Body Composition in Relation to Clinical Outcomes in Patients with Inflammatory Bowel Disease
- Complex biostatistical models, networks and evidence synthesis to guide policy decisions in surgery
Research grants- Postgraduate
- Determination of body composition using computerized tomography analysis in colorectal cancer patients – St Mark’s Foundation £38.000
- “Body Composition manipulation in CoLorectal cancer” – Private funding £250.000
Summary of administrative experience- Experience in medical education / health care education
Clinical Audit
Table of Clinical Audits
|
Total |
Idea |
Design Lead |
Data collection |
Data Analysis |
Presentation |
Cycle Completed |
Clinical Audit |
10 |
9 |
9 |
10 |
9 |
8 |
3 |
Selected Clinical Audits
- The process of transition to adjuvant therapy after colorectal cancer surgery
New Audit and Re-audit
Standard Audited: Timing from surgery to adjuvant chemotherapy for colorectal cancer patients
Role I Played: Project design, data collection, analysis and presentation
Date: Audit: January 2013, re-audit; March 2015
Location: St Marks Hospital, Harrow
Findings: The median time from surgery to chemotherapy in this cohort study was 72 days.
Cycle completed? Yes Results; Reduction in the median time from surgery to chemotherapy.
Poster at ASCGBI 2013, ESCP 2014
- National Emergency Laparotomy Audit
New audit
Standard Audited: structure, process and outcome measures for the quality of care received by patients undergoing emergency laparotomy
Role: Data Collection
Date; January 2015
Location; Northwick Park/ St Mark’s Hospital, London
Findings; TBC
- ERAS shows significant changes in primary length of stay for colorectal cancer patients after 18 months of implementation
New audit
Standard audited: the effect of integration and dissemination of ERAS with laparoscopy on an NHS Trust.
Role; Idea, Study design, Data collection, Data analysis, presentation
Date; July 2012
Locations; St Mark’s Hospital
Findings: Significant changes in the means of primary LOS coincided with increased proportion of ERAS and laparoscopy.
Poster at ESCP 2013
- The use and diagnostic yield of plain chest x-rays in the Accident & Emergency Department
New Audit and Re-audit
Standard Audited: use of CXR in the A+E department
Role I Played: idea, study design, data collection, presentation
Date: January 2008
Location; A+E department at UCH, London
Findings: Large proportion of the CXR ordered were unnecessary
Cycle Completed? Yes Changes applied; Structured proforma for CXR request. Results: Proportion of the CXR unnecessary ordered was decreased.
Courses and Continuing Professional Development (n=28)
Clinical and Surgical Skills Courses (n=14)
Title |
Provider |
Outcome |
Date Completed |
|
RCS England St Mark’s Hospital St George’s Hospital Royal College of Surgeon St Mark’s Academic institute |
Passed Passed Passed Passed Passed |
18th May 2017 8th December 2016 17-19th Oct 2016 3-4th March 2016 15th January 2015 |
|
EFIDS |
Passed |
4th September 2014 |
|
EFIDS |
Passed |
15th November 2013 |
|
Royal College of Surgeons - Grimsby |
Passed |
12th December 2012 |
|
St Mark’s Academic institute |
Passed |
3rd October 2012 |
|
Royal College of Surgeons |
Passed |
17th November 2011 |
|
BAUS |
Passed |
3rd June 2010 |
|
Royal College of Surgeons –Ipswich |
Invited to teach |
18th September 2008 |
|
Pilgrim Hospital |
Pass |
29th November 2008 |
|
Royal College of Surgeons – Warwick |
Invited to teach |
18th October 2008 |
|
UCH |
Passed |
7th July 2008 |
|
Northwick Park Hospital |
Passed |
4th April 2008 |
|
RCNS |
Passed |
13th March 2008 |
Teaching Courses (n=4)
Title |
Provider |
Outcome |
Date completed |
|
Imperial College |
Passed |
14th January 2015 |
|
Imperial College |
Passed |
22nd April 2014 |
|
London Deanery |
Passed |
December 2013 (series of courses) |
|
Oxford Medical |
Passed |
14th November 2011 |
Statistics Courses (n=2)
Title |
Provider |
Outcome |
Date completed |
|
Imperial College |
Passed |
14th December 2014 |
|
Imperial College |
Passed |
22nd November 2012 |
Leadership and management Courses (n=3)
Title |
Provider |
Outcome |
Date completed |
|
Chelsea and Westminister Imperial College |
Passed Passed |
20th Nov 2018 14th March 2014 |
|
St Mark’s Academic institute |
Passed |
22nd March 2014 |
|
Northwick Park Hospital |
Passed |
17th April 2014 |
Research related Courses (n=5)
Title |
Provider |
Outcome |
Date completed |
|
Imperial College |
Passed |
14th March 2014 |
|
Imperial College |
Passed |
22nd March 2014 |
|
Imperial College |
Passed |
17th April 2014 |
|
Imperial College |
Passed |
16th December 2012 |
|
Imperial College |
Passed |
12th May 2012 |
Selected National And International Conferences
Title |
Venue |
Date |
|
Dublin, Ireland Manchester; UK Durham; UK |
Sept 2015 Apr 2015 Jan 2015 |
|
London; UK |
Sept 2014 |
|
Barcelona; Spain |
Sept 2014 |
|
Munich; Germany |
July 2014 |
|
Birmingham; UK |
July 2014 |
|
Cambridge; UK |
Jan 2014 |
|
Berlin; Germany |
Oct 2013 |
|
Amsterdam; Netherlands |
Oct 2013 |
|
Belgrade; Serbia |
Sept 2013 |
|
Glasgow; UK |
May 2013 |
|
Dublin; Ireland |
June 2012 |
|
Chicago; USA |
Sept 2010 |
|
Munich; Germany |
Sept 2009 |
Leadership - Management - Innovation
Major Leadership and Management Positions in Hospital
- Senior Teaching Fellow in General Surgery for Imperial College based at Northwick Park Hospital, London
- Clinical Tutor for the postgraduate teaching term at St Mark’s Hospital and Academic institute, London
Editorial Activities
- Guest Associate Chief Editor, Cancer Endocrinology, Frontiers in Endocrinology Journal
- Peer reviewer for various medical journals
- British Medical Journal
- British Journal of Surgery
- Annals of Surgical Oncology
- Clinical Nutrition
- Mediators of inflammation
- BioMed Research International
- Tumour Biology
- Colorectal Disease
Professional Societies
Member of:
- ASiT
- ESCP
- Duke’s club
- BASO
Innovation
- Co-Founder and chief editor of the crowd-funding platform startupscience.co.uk.
- This novel platform was designed to improve the communication between researchers and the community and enable more interaction and social engagement.
Other Professional Positions – National Representative Role
- Co-founder and operations director of Medynamic.co.uk
- MeDynamic is a UK based consulting firm that offers advice and a wide range of services for individuals who wish to study or pursue a medical career in the NHS. Lead role in organizing relevant study days.
- Co-Founder and Vice President of the Greek Medical Association (GMA) in the UK.
- The Greek Medical Association UK is a newly founded organization of young doctors, dentists and biomedical professionals who live and work in the United Kingdom. Lead role in organizing gala and charity events.
Other Management Roles
- Participation in the monthly meetings of the “Fellows in medical education” programme organized from the London deanery.
- Engaged with a range of change management projects relating to medical education with specific emphasis on quality and safety improvement, inter-professional learning and clinical leadership.
- Leading figure for the FY1 tutor programme
- This new programme enables FY1 to do one hour bedside teaching for undergraduates each week. My role is to organize and give feedback to the FY1 for their teaching effort
Honours-Awards
Educational Prizes - Undergraduate
- Hellenic State Scholarship Foundation: Awarded 6-year scholarship covering the full length of my medical studies as a top-ranking student. (2001-2007)
- University Entrance Examinations for Greek universities known as PanHellenic Exams, which are held under the auspices of the Cyprus Ministry of Education: 1st place among thousands of examinees and offered a place in the School of Medicine of the University of Athens. (1999)
Research awards- International
- Oral presentation at UKRC on Endometrial DWI won the BIR Leonard Levy Prize at UK Radiological Congress (UKRC) 2009
- The abstract ‘Preoperative neutrophil to lymphocyte ratio >3 as a predictor for disease-free survival after curative colorectal cancer surgery.’ selected as poster of excellence at United European Gastroenterology Week (UEGW) Berlin 2013
- The abstract “Medical Student Experience in Surgery Influences Their Career Choices; A Systematic Review of the Literature” accepted as an E-Poster of Distinction at the ASGBI International Surgical Congress 2014
Travel Grants – fellowships- International
- Travel grant for the EFISDS-LYON HBP Course 15 November 2013.
- Fellowship Grant to attend the European Cancer Congress 2013, held in Amsterdam, the Netherlands from 27 September to 1 October 2013.
- Travel bursary to attend the United European Gastroenterology Week 2013 in Berlin October 2013.
Teaching awards- Postgraduate
- Teaching hero award from Imperial College School of Medicine