International Presentations

  1. Fasting small intestinal transit time and motor activity.
    The Royal Physiological Society, Cambridge, August 1983
  2. Short chain fatty acids reduce human longitudinal colonic motility in vitro.
    The British Society of Gastroenterology, Warwick, October 1993
  3. Relationships between motility of the right and left colon
    The Gastroenterology International Research Group, London, November 1993
  4. The human rectocolonic inhibitory reflex.
    The Surgical Research Society, London, January 1994
  5. Human colonic motility is unaffected by short chain fatty acids in vivo.
    The British Society of Gastroenterology, Manchester, March 1994
  6. The human rectocolonic inhibitory reflex: normal and constipated patients.
    The British Society of Gastroenterology, Manchester, March 1994
  7. The human rectocolonic inhibitory reflex: normal and constipated patients.
    The Surgical Research Society, Glasgow, July 1994
  8. Human colonic motility is unaffected by short chain fatty acids in vivo.
    The Surgical Research Society, Glasgow, July 1994
  9. Luminal contents and human colonic motility.
    The British Society of Gastroenterology, Edinburgh, September 1994
  10. Neural mediation of the human rectocolonic inhibitory reflex.
    The British Society of Gastroenterology, Edinburgh, September 1994
  11. The human rectocolonic inhibitory reflex and constipation.
    The Xth World Congress of Gastroenterology, Los Angeles, California,USA,Oct 1994
  12. Fibre and in vitro human colonic motility.
    The Xth World Congress of Gastroenterology, Los Angeles, California,USA,Oct 1994
  13. Fibre and in vivo human colonic motility.
    The Xth World Congress of Gastroenterology, Los Angeles, California,USA,Oct 1994
  14. Linking slow transit constipation with outlet obstruction.
    Association of Surgeons of Great Britain and Ireland, London, June 1995
  15. Laparoscopic repair of abdominal incisional hernias.
    Association of Surgeons of Great Britain and Ireland, Brighton, May 1999
  16. Laparoscopic assisted Crohn’s ileocolic resection
    Association of Surgeons of Great Britain and Ireland, Brighton, May 1999
  17. The rectal modulatory role in idiopathic slow transit constipation.
    Association of Coloproctogy of Great Britain and Ireland, Southport, June 1999
  18. Laparoscopic repair of abdominal incisional hernias.
    Association of Endoscopic Surgeons of Great Britain and Ireland, Bath, Nov 1999
  19. The David Dunn Memorial Travelling Fellowship Lecture.
    Association of Surgeons of Great Britain and Ireland, Cardiff, May 2000
  20. Laparoscopic repair of abdominal incisional hernias. (video presentation)
    Association of Surgeons of Great Britain and Ireland, Cardiff, May 2000
  21. Abdominal Laparoscopic Surgery. (BMI National Conference)
    The Royal College of Physcians, London, May 2001
  22. Self Centred Laparoscopic Incisional Hernia Repair – A Ten Year Experience
    European Association of Endoscopic Surgeons, Barcelona, Sept 2003
  23. Laparoscopic Unilateral Inguinal Hernia Repair: A Prospective Study
    Association of Surgeons of Great Britain and Ireland, Harrogate, May 2004
  24. Cost Effective Day Case Laparoscopic Mesh Repair of Large Incisional Hernias
    Association of Laparoscopic Surgeons, Liverpool, November 2004
  25. Totally Laparoscopic Feeding Jejeunostomy
    Association of Surgeons of Great Britain and Ireland, Glasgow, April 2005
  26. District General Day Case Laparoscopic Mesh Repair of Large Incisional Hernias
    European Association of Endoscopic Surgeons, Venice, June 2005
  27. Is Routine Laparoscopic Intra-Operative Cholangiography Justified?
    European Association of Endoscopic Surgeons, Venice, June 2005
  28. Incremental Value of Dual Modality PET-CT Imaging over PET alone in Colorectal Cancer
    European Association of Coloproctology, Bologna, Sept 2005
  29. Investigation of Lower Gastrointestinal Symptoms in Patients Aged 80 Years or More – are we Getting it Right?
    European Association of Coloproctology, Bologna, Sept 2005
  30. Colonoscopic Surveillance for High and Low Risk Colorectal Polyps – Do National Guidelines Change Practice?
    European Association of Coloproctology, Bologna, Sept 2005
  31. Barium Enemas in the Over 80’s – A Waste of Time?
    British Geriatric Society, Harrogate, Oct 2005
  32. Laparoscopic Mesh Repair of Incisional Hernias is More Cost Effective Than the Open Approach
    Association of Laparoscopic Surgeons, Galway Ireland, November 2005
  33. The Invasion of Minimally Invasive Surgery
    The National Association of Crohns and Colitis, London, December 2005
  34. Long term follow up of a novel technique for repair of incisional hernias.
    The Society of American Gastrointestinal and Endoscopic Surgeons.
    Dallas 2006
  35. Risk stratification of colonic polyps predicts the frequency of further polyps but not the degree of dysplasia
    Association of Surgeons of Great Britain and Ireland, Edinburgh 2006
  36. Bleeding polyps are the worrisome ones.
    Association of Surgeons of Great Britain and Ireland, Edinburgh 2006
  37. Patient’s perception of surgical appearance
    Association of Surgeons of Great Britain and Ireland, Edinburgh 2006
  38. Laparoscopic appendicectomy performed by trainees is safe and effective.
    Association of Surgeons in Training, Edinburgh 2006
  39. Intraoperative cholangiography – a missed training opportunity?
    Association of Surgeons in Training, Edinburgh 2006
  40. Laparoscopic learning curves.
    World Congress of Surgery, Berlin 2006
  41. Co-operation between specialties is beneficial in laparoscopic urological training.
    World Congress of Surgery, Berlin 2006
  42. Incisional Hernia rates after laparoscopic colorectal resection. A further advantage of the laparoscopic approach
    World Congress of Surgery, Berlin 2006
  43. General Surgeons have a role to play in urological laparoscopic training.
    28th Congress of the Societe Internationale d’Urologie, South Africa 2006
  44. Do national guidelines for colorectal polyp surveillance safely predict subsequent colorectal polyp formation?
    European Society of Coloproctology, Lisbon 2006
  45. Can the nature of colorectal polyps be predicted by presenting symptoms?
    European Society of Coloproctology, Lisbon 2006
  46. Day Case Laparoscopic Rectopexy in Selected Patients
    Association of Coloproctology of GB & I, Glasgow 2007
  47. Should Regular Outpatient Assessment be Eliminated from Colorectal Cancer Follow-Up Clinics?
    British Association of Surgical Oncologists, London 2007
  48. CEA is the Best and Most Cost-effective Surveillance in Colorectal Cancer
    Association of Coloproctology of GB & I, Glasgow 2007
  49. Cost Savings From a Protocol Led Follow-Up Program after Curative Treatment of Colorectal Cancer
    British Association of Surgical Oncologists, London 2007
  50. Cost Effective Day Case Laparoscopic Rectopexy in Selected Patients
    Association of Surgeons of Great Britain & Ireland, Manchester 2007
  51. Cancer Patients Really Served by a Target Referral System?
    Association of Surgeons in Trianing, Belfast 2007
  52. Blind Flank Trocar Placement to Achieve Pneumoperitoneum
    Association of Laparoscopic Surgeons, Newcastle 2007
  53. Screening for Bowel Cancer
    N London, Feb 2007
  54. Day Case Laparoscopic Cholecystectomy in the Elderly
    SAGES, Philadelphia April 2008
  55. Blind Flank Trocar Placement to Achieve Pneumoperitoneum
    SAGES, Philadelphia April 2008
  56. Should Regular Outpatient Assessment be Eliminated from Colorectal Cancer Follow-Up Clinics?
    British Assoc Surgical Oncologists, 2008
  57. Do Patients with Abscesses get a Raw Deal in the NHS?
    Association of Coloproctology of GB & I, Gateshead July 2008
  58. Day Case Laparoscopic Cholecystectomy in the Elderly
    Association of Surgeons of GB & I, Bournemouth May 2008
  59. ‘How Accurate is an Endoscopist’s Hunch for Cancer? Correlation with Histology.
    Association of European Gastroenterology, Vienna Austria Oct 2008
  60. Do Patients with Perineal Abscesses Get A Bum Deal in the NHS?
    Royal Society of Medicine, London Feb 2008
  61. Hernia Repairs – Time is of the Essence
    Association of Surgeons of GB & I, Bournemouth May 2008
  62. How Acceptable is Day Case Laparoscopic Cholecystectomy?
    European Association of Endoscopic Surgeons, Stockholm June 2008
  63. Are Laparocopic Surgeons Really Slow?
    European Association of Endoscopic Surgeons, Stockholm June 2008
  64. Day Case Laparoscopic Cholecystectomy
    British Association of Day Case Surgery, Scarborough June 2008
  65. Recent Advances in Colorectal Cancer
    N London Feb 2009
  66. How Accurate is an Endoscopist’s Hunch for Cancer? Correlation with Histology
    British Society for Gastroenterology, March 2009
  67. Laparoscopic Anterior Resections use Fewer Defunctioning Stomas
    SAGES Phoenix Arizona, April 2009
  68. Enhanced Patient Satisfaction with the Enhanced Recovery After Surgery (ERAS) Programme
    Association of Surgeons GB & I, Glasgow May 2009
  69. The 7am Abscess List
    Association of Surgeons GB & I, Glasgow May 2009
  70. M R Pelvimetry as a Predictor of Operating Time in Laparoscopic Resection of Rectal Cancer
    European Association of Endoscopic Surgeons, Prague June 2009
  71. Advances in Colorectal Cancer
    BMI Regional Conference, London January 2009
  72. Colovesical and Colovaginal Fistulae (CVF) – Can we Streamline Investigations?
    European Association of Coloproctology, Prague June 2009
  73. Intra-operative Cholangiography: A roadmap to variation in extra-hepatic biliary tree anatomy and implications during laparoscopic cholecystectomy
    Association of Laparoscopic Surgeons GB & I, Tonbridge Wells, Nov 2009
  74. Laparoscopic Reversal of Hartmann’s – Is It Really Worth It?
    Association of Laparoscopic Surgeons GB & I, Tonbridge Wells, Nov 2009
  75. Dilating Laparoscopic Trocar Ports Significantly reduce Postoperative Pain
    European Association of Endoscopic Surgeons, Geneva, June 2010
  76. Enhanced Recovery After Laparoscopic and Open Colorectal Surgery: Does Protocol Adherence Drift With Time?
    European Association of Endoscopic Surgeons, Geneva, June 2010
  77. Age Related Postoperative Pain After Laparoscopic Surgery
    European Association of Endoscopic Surgeons, Geneva, June 2010
  78. Tips, tricks and Pitfalls in Intraoperative Cholangiography
    European Association of Endoscopic Surgeons, Geneva, June 2010
  79. Postoperative Ileus in Patients undergoing Laparoscopic versus Open Resections within an Enhanced Recovery Programme
    European Association of Endoscopic Surgeons, Geneva, June 2010
  80. Acute Abdominal Pain and Raised Liver Function Tests: Should we Order an Endoscopic Retrograde or Magnetic Resonance Cholangiopancreatography?
    European Association of Endoscopic Surgeons, Geneva, June 2010
  81. Day Case Laparoscopic Exploration of Common Bile Duct in Selected Patients
    European Association of Endoscopic Surgeons, Geneva, June 2010
  82. Improving Training Opportunities for European Colorectal Trainees
    European Association of Coloproctology, Sorrento, Sept 2010
  83. Management of Malignant Colorectal Polyps
    European Colorectal Congress, St Gallen, Switzerland, Sept 2010
  84. Laparoscopic Surgery for Colorectal Cancer
    Colorectal Conference., N London, April 2011
  85. Does the Type of Segmental Laparoscopic Colorectal Resection Influence Post-operative Recovery?
    Association of Laparoscopic Surgeons GB & I, Cardiff, Nov 2011
  86. Can We Predict the Length of Post-operative Stay for Laparoscopic Colorectal Resections?
    Association of Laparoscopic Surgeons GB & I, Cardiff, Nov 2011
  87. Laparoscopic Surgery Confers Post-operative Advantages Over Open Surgery for Colorectal Surgery Within Enhanced Recovery Programmes
    Association of Laparoscopic Surgeons GB & I, Cardiff, Nov 2011
  88. Early Removal of the Urethral Catheter after Colorectal Resection In Patients with an Epidural Catheter
    European Society of Coloproctology, Vienna, Sept 2012
  89. Needloscopic Laparoscopic technique in Appendicectomy: Is it Worth It?
    Association of Laparoscopic Surgeons GB & I, Cork, Nov 2012
  90. Why Use 4 When You Can Use 3? Minimising Invasion
    Association of Laparoscopic Surgeons GB & I, Cork, Nov 2012
  91. Should We Be Moving Towards Needloscopic Laparoscopic Surgery?
    Association of Laparoscopic Surgeons GB & I, Cork, Nov 2012
  92. ‘Be Clear on Cancer’ How a National Health Campaign Affects Colorectal Cancer Referrals and Detection Rates in the UK
    American Society of Colorectal Surgeons, Phoenix, Arizona, May 2013
  93. Laparoscopic and Robotic TME for Rectal Cancer in 2013
    Vernaza M, Warren S J, Mathur P et al
    TME Symposium, Portsmouth June 2013
  94. ‘Be Clear on Cancer’ How a National Health Campaign Affects Colorectal Cancer Referrals and Detection Rates in the UK
    Li D, Gosling J, Warren S J
    Association of Coloproctology GB & I, Liverpool, July 2013
  95. IBD Course presentation Nov 2012 ICENI

  • How do I get a Referral?

    Referrals can be made by your GP or by yourself as self referral.

  • Where can I see Mr Warren?

    Stephen Warren's Private surgical practice is at Kings Oak Hospital, Enfield, North London or Wellington Hospital, St Johns Wood, North London.

  • What conditions does Mr Warren treat?

    Take a look at the list of conditions treated on the Referrals page. This is not an exclusive list.