Mr Anthony Antoniou

Personal profile

"A specialist in bowel conditions, from cancer to inflammatory bowel disease, Antoniou was instrumental in building the Royal Marsden's colerectal unit and introducing keyhole surgery to the department".

Mr Anthony Antoniou is a consultant laparoscopic and colorectal surgeon at St Marks Hospital in Harrow and Central Middlesex Hospital in London. Mr Antoniou's practice covers all aspects of colorectal and general surgery as well as acute general surgical emergencies.

His main areas of interest include laparoscopic (‘keyhole’) colorectal surgery; treating patients with colon and rectal cancer; and endoscopic (‘telescopic’) procedures. Having graduated from Cambridge University in 1992, he trained in East Anglia, the South East of England and London. While training in London Anthony was affiliated with major teaching hospitals such as King’s College Hospital and St Mary’s Hospital (where he undertook a laparoscopic fellowship at the Hamlyn Unit), prior to his consultant appointment at The Royal Marsden Hospital in 2006.

He achieved FRCS in 1996 and was awarded an MS in 2006. Mr Antoniou has been instrumental in building the colorectal unit at The Royal Marsden Hospital, a world leading cancer hospital, and this unit now treats local, national and international patients. He has also played a key part in introducing laparoscopic / minimally invasive colorectal surgery to The Royal Marsden, developing its endoscopy unit and promoting a multi-disciplinary approach to patient care for enhanced outcomes.

Mr Antoniu see patients with a variety of symptoms including bleeding from the anus, blood in stools, changes in bowel habits including constipation, diarrhoea and pain, abdominal pain, unexplained weight loss, recurrent nausea or vomiting, faecal incontinence and piles/haemorrhoids.

Professional Membership



  • Associate member of The Royal Society of Medicine (RSM)

  • Associate member of The Association of Coloproctology of Great Britain and Ireland (ACPGBI)

  • Associate member of The Association of Surgeons of Great Britain and Ireland (ASGBI)

  • Associate member of The Association of Laparoscopic Surgeons of Great Britain and Ireland (ALSGBI)

Clinical Interests



  • Colorectal surgery

  • Laparoscopic (‘keyhole’) surgery

  • Colon and rectal cancer surgery

  • Recurrent cancer surgery

  • Anal surgery including anal cancer

  • Inflammatory bowel disease (ulcerative colitis & Crohn’s disease)

  • Functional bowel disease and motility disorders

  • Diagnostic and therapeutic endoscopy (gastroscopy, colonoscopy, OGD & flexible sigmoidoscopy)

  • Colon cancer prevention including bowel cancer screening and removal of polyps by colonoscopy

  • Small bowel conditions (Crohn's disease, polyps, tumours, bleeding & strictures)

  • Gastrointestinal bleeding

  • Radiation proctitis

  • General surgery

  • H.A.L.O. (Haemorrhoidal Artery Ligation Operation)

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