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Assoc Prof Emile John Tan Kwong Wei

Assoc Prof Emile John Tan Kwong Wei

​BSc (Hons), MBBS (London), MD (Research)(Imperial College London), FRCS (General/Colorectal) UK

Head & Senior Consultant

Singapore General Hospital

Specialty: Surgery & Surgical Oncology, Colorectal Surgery

Clinical Interest: Colorectal Surgery, Inflammatory Bowel Disease, Pelvic Floor Disorders, Disease of the Anus, Endoscopy, Minimally Invasive Surgery – Robotic and Laparoscopic Surgery

Conditions Treated by this Doctor:
Colorectal Cancer, Diseases of the Anus, Endoscopy, Inflammatory Bowel Disease, Minimally Invasive Surgery (MIS) in Robotic and Laparoscopic Surgery, Pelvic Floor Disorders.

Clinical Appointments

  • Head & Senior Consultant Colorectal Surgery Singapore General HospitalSingapore General Hospital
  • Surgical Team Inflammatory Bowel Disease Centre Singapore General HospitalSingapore General Hospital
  • Head & Senior Consultant Division of Surgery & Surgical Oncology National Cancer Centre SingaporeNational Cancer Centre Singapore


​Emile read Medicine at the University College London Medical School before completing both his basic and higher surgical training in London. He completed a year-long fellowship at the Royal Marsden Hospital, London, training in advanced and recurrent colorectal cancer surgery, and spent a further year at the renown St Marks’ Hospital in Harrow, UK, training in advanced laparoscopic surgery, intestinal failure, pelvic floor disease and inflammatory bowel disease, before being appointed Consultant and Clinical Senior Lecturer with Imperial College London, operating on the Chelsea and Westminster and Royal Marsden Hospital Campus. 

Along the way, he helped to set up a pelvic floor translational research platform on behalf of Imperial College London, and took the opportunity to develop his career as a clinical academic. He was awarded a National Institute for Health (NIHR UK) Academic Clinical Fellowship in 2008, followed by an NIHR award for a Clinical Academic Lectureship in 2011. 

Emile has published widely in international peer-reviewed journals, and presented internationally. He maintains a strong interest in minimally invasive and open cancer surgery, and pelvic floor disease, in particular laparoscopic prolapse and functional surgery, as well as neuromodulation. 

He continues to work towards balancing his clinical and academic practice, together with his responsibilities to his family.


  • Fellow of the Royal College of Surgeons of England (General and Colorectal Surgery) 2013

  • Doctor of Medicine by Research, Imperial College London 2012

  • Member of the Royal College of Surgeons of England 2007

  • Bachelor of Medicine, Bachelor of Surgery, University College London Medical School 2001

  • Bachelor of Science, University College London (Immunology and Cell Pathology)

Professional Appointments and Committee Memberships

  • Adjunct Associate Professor, Duke-NUS Medical School
  • Clinician Champion, Value Driven Outcomes (Colonoscopy and Rectal Resections)
  • Co-Director, Health Services Research, Surgery Academic Clinical Program, SingHealth-Duke NUS Academic Medicine Partnership
  • Co-Lead, Cardiovascular Theme, SGH Centre Grant Team
  • SingHealth Research Executive Committee
  • SingHealth Health Services Research Executive Committee


  • Singapore Health Quality Service Award – Silver 2018
  • Clinical Academic Lectureship in Surgery, National Institute for Health Research UK 2011
  • Poster of Distinction, Association of Surgeons of Great Britain and Ireland 2011
  • Teaching Hero Award, Imperial College London 2010
  • Distinguished Oral Abstract (Imaging and Advanced Technology), Digestive Diseases Week USA 2008
  • Shanks Foundation Award, Immunology and Cell Pathology University College London 1998

Research Interests

Short term outcomes of randomized controlled trials of Ligasure versus conventional haemorrhoidectomy”
Tan EK, Cornish J, Darzi AW, Papagrigoriadis S, Tekkis PP
Gut. 2007 Jun;56(6):830-7 
“A meta-analysis on the Influence of Inflammatory Bowel Disease on Pregnancy”
Cornish J, Tan E, Teare J, Teoh TG, Rai R, Clark S, Tekkis P


Int J Colorectal Dis. 2018 May;33(5):645-648. doi: 10.1007/s00384-018-2976-z. Epub
Sacral nerve stimulation versus percutaneous tibial nerve stimulation for faecal incontinence: a systematic review and meta-analysis.
Simillis C, Lal N, Qiu S, Kontovounisios C, Rasheed S, Tan E, Tekkis PP

Updates Surg. 2018 Mar;70(1):15-21. doi:10.1007/s13304-017-0507-z. Epub
Functional outcomes with handsewn versus stapled anastomoses in the treatment of ultralow rectal cancer.
Ramage L, Mclean P, Simillis C, Qiu S, Kontovounisios C, Tan E, Tekkis P
Updates Surg. 2017 Dec 19. doi: 10.1007/s13304-017-0506-0. Epub
Can we correlate pelvic floor dysfunction severity on MR defecography with patient-reported symptom severity? Ramage L, Georgiou P, Qiu S, McLean P, Khan N,  Kontnvounisios C, Tekkis P, Tan E
Tech Coloproctol. 2017 Dec;21(12):915-927
Magnetic resonance defecography versus clinical examination and fluoroscopy: a systematic review and meta-analysis. 
Ramage L, Simillis C, Yen C, Lutterodt C, Qiu S, Tan E, Kontovounisios C, Tekkis P
Int Urogynecol J. 2017 Nov;28(11):1709-1717
Functional and quality of life outcomes following obstetric anal sphincter injury (OASI): does the grade of injury affect outcomes? 
Ramage L, Yen C, Qiu S, Simillis C, Kontovounisios C, Tekkis P, Tan E
Int J Colorectal Dis. 2017 May;32(5):667-674 
Evaluation of sexual dysfunction in female patients presenting with faecal incontinence or defecation disorder. 
Pellino G, Ramage L, Simillis C, Warren O, Kontovounisios C, Tan E, Tekkis P
Colorectal Disease 2016 May;18(5):441-58
“Adoption and success rates of perineal procedures for fistula-in-ano- a systematic review”
Kontovounisos C, Tekkis P, Tan E, Rasheed S, Darzi A, Wexner SD
Diseases of the Colon and Rectum 2016 Feb;59(2):132-9
“Transcutaneous sacral electrical stimulation for chronic functional constipation”
Iqbal F, Thomas GP, Tan E, Askari A, Dastari JK, Nicholls J, Vaizey CJ
Colorectal Disease 2016 Feb; 18(2):173-8
“Bilateral transcutaneous tibial nerve stimulation for chronic constipation”
Iqbal F, Collins B, Thomas GP, Askari A, Tan E, Nicholls RJ, Vaizey CJ
Colorectal Disease 2015 Dec;17(12):1062-70
“Hand-sewn coloanal anastomosis for low rectal cancer: technique and long-term outcome”
Tekkis P, Tan E, Kontovounisios C, Kinross J, Georgiou C Nicholls R J, Rasheed, S, Brown G
British Journal of Surgery 2015 Dec; 102(13):1603-18
“Systematic review and network meta-analysis comparing clinical outcomes and effectiveness of surgical treatments for haemorrhoids”
Simillis C, Thoukididou SN, Slesser AA, Rasheed S, Tan E, Tekkis PP
Colorectal Disease 2015 Sep;17(9):762-71
“A systematic review of sacral nerve stimulation for low anterior resection syndrome”
Ramage L, Qiu S, Kontovounisios C, Tekkis P, Rasheed S, Tan E
Techniques in Coloproctology 2015 Jul;19(7):381-9
“Is robotic ventral mesh rectopexy better than laparoscopy in the treatment of rectal prolapse and obstructed defecation? A meta-analysis.”
Ramage L, Georgiou P, Tekkis P, Tan E
Colorectal Disease 2015 Jan; 17(1):7-16
“Complete Mesocolic Excision in Colorectal Cancer – a systematic review”
Kontovounisos C, Tan E, Rasheed S, Nicholls RJ, Xynos E, Tekkis P

Colorectal Disease 2014 Dec;16(12);971-5
“Modified right colon inversion technique as a salvage procedure for low colorectal or coloanal anastomosis – long-term outcomes”
Kontovounisios C, Baloyiannis Y, Kinross J, Tan E, Rasheed S, Tekkis P
British Journal of Surgery 2013 Jul; 100(8)1009-14
“Consensus statement of the multidisciplinary management of patients with recurrent and primary rectal cancer beyond total mesorectal excision planes”
Beyond TME Collaborative
Inflamm Bowel Dis. 2012 Sep;18(9):1601-7
“Study of sexual, urinary and fecal function in females following restorative proctocolectomy”
Cornish J, Wooding K, Tan E, Nicholls RJ, Clark SK, Tekkis PP
Colorectal Disease. 2011 Oct;13(10):e339-44
“Female infertility following restorative proctocolectomy”
Cornish JA, Tan E, Singh B, Bundock H, Mortensen N, Nicholls RJ, Clark SK, Tekkis PP
Int J Colorectal Dis. 2011 Mar;26(3):275-94. Epub 2011 Jan 29 
“Meta-analysis: sacral nerve stimulation versus conservative therapy in the treatment of faecal incontinence” 
Tan E, Ngo NT, Darzi A, Shenouda M, Tekkis PP
Surg Oncol. 2011 Jun;20(2):e72-7. Epub 2010 Nov 10
“The National Bowel Cancer Audit Project: The impact of organizational structure on outcome in operative bowel cancer within the United Kingdom”  
Cornish JA, Tekkis PP, Tan E, Tilney HS, Thompson MR, Smith JJ
Lancet Oncology 2009 Nov;10(11):1053-62
“Extended Lymphadenectomy versus conventional surgery for rectal cancer: a meta-analysis”
Georgiou P, Tan E, Gouvas N, Antoniou A, Brown, G, Nicholls RJ, Tekkis P  
International Journal of Colorectal Disease 2009 Oct;24(10):1119-31
“Fast Track versus Standard Care in colorectal surgery: a meta-analysis update”
Gouvas N, Tan E, Windsor A, Xynos E, Tekkis PP
IEEE Trans Med Imaging 2009 Jun;28(6):926-36
“Physical based statistical shaped modelling of the levator ani”
Lee SL, Tan E, Khullar V, Gedroyc W, Darzi A, Yang GZ
Surgical Oncology 2009 Mar;18(1):15-24
“Diagnostic precision of carcinoembryonic antigen in the detection of recurrence of colorectal cancer”
Tan E, Gouvas N, Nicholls RJ, Ziprin P, Xynos E, Tekkis P
Alimentary Pharmacology and Therapeutics 2008 Oct 1;28(7)854-67
“Meta-analysis: narrow band imaging for lesion characterization in the colon, oesophagus, duodenal ampulla and lung”
East J, Tan EK, Bergman JJ, Saunder PP, Tekkis P
Colorectal Disease. 2008 Sep;10(7):653-62
“A cost-effectiveness analysis of delayed sphincteroplasty for anal sphincter injury”
Tan E, Jacovides M, Khullar V, Teoh TG, Fernando R, Tekkis P
European Journal of Cancer. 2007;43:2285-94
“The UK National Bowel Cancer Audit - epidemiology and surgical risk in the elderly”
Tan E, Tilney H, Thompson M, Smith J, Tekkis P
Archives of Surgery. 2007 Dec;142(12):1209-1218

Research Trials

  • Efficacy of Acupuncture as a treatment for faecal incontinence – PI
  • 2Understanding illness experience, long-term treatment consequence and unmet supportive care needs after surviving colorectal cancer – PI
  • Ageing in Colorectal Cancer – a study of symptoms, function and quality-of-life in long-term survivor