Mr A Shiyam Nizar

Mr A Shiyam Nizar

Consultant Colorectal and General Surgeon


"I am proud to work at Spire St Anthony's Hospital. It has excellent facilities including state of the art integrated theatres and a dedicated Intensive Care Unit."

Specialises in

  • Minimally invasive bowel cancer surgery
  • IBS/IBD/Crohn's and diverticulitis
  • Haemorrhoid treatment
  • Hernia surgery
  • Endoscopy and colonoscopy

Also available for:

Virtual consultations:

I have been a Consultant Colorectal Surgeon at Frimley Park Hospital, Surrey for over three years. I have a specialist interest in minimal access keyhole and robotic bowel cancer surgery, helping continue the excellent work that has been developed in this area at Frimley Park Hospital.

Specialist interest in: Management of colorectal cancer; Laparoscopic and Robotic bowel cancer surgery; Transanal micro-surgery for polyps and early rectal cancer; Colonoscopy and removal of polyps; Diagnostic endoscopy; Emergency minimally invasive surgery for acute abdominal conditions; Haemorrhoid surgery including injection, banding, traditional haemorrhoidectomy, stapled haemorrhoidectomy, HALO and Rafaelo, Proctology: fissures, fistulae, abscess and sinuses and Prolapse and incontinence.

I went to medical school at St George's Hospital University of London and completed my higher surgical training programme in London and Surrey, following a period of research in colorectal cancer. In addition to my expertise in bowel cancer, my practice has provided me with great experience managing other benign bowel disorders including, anorectal problems, inflammatory bowel disease, irritable bowel disease, anaemia and pelvic floor disorders.

I am Surgical Lead for the blood transfusion committee at Frimley Park Hospital, Lead for colorectal enhanced recovery and Surgical Lead for Physician Associate students.


General Medical Council Number: C4712396

Treatment information

Some of the principal treatments carried out by Mr A Shiyam Nizar at Spire include:

Other treatments

  • Appendicectomy
  • HALO
  • Laparoscopy investigation and treatment
  • Pilonidal sinus
  • Rafaelo procedure

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Important information about Covid-19 tests

COVID-19 testing or antibody tests are not available as a standalone service at Spire St Anthony's Hospital.


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Additional information

Bowel disease
Colorectal surgery
Gastrointestinal cancer
Gastrointestinal pathology
Gastrointestinal surgery
General surgery
Hernia repair surgery
Inflammatory bowel disease
Laparoscopic surgery
Minimal access surgery
Motility disorder

MBBS / St George's University of London / 2000
Medical Degree

Professional memberships

General Medical Council (GMC)

Royal College of Surgeons of England


Imprint cytology- a viable alternative to OSNA in Sentinel Node Analysis of axillary lymph node in Breast Cancer? Nizar S, Shambayati B, Higgs J, Shrotria S. Submitted to The Journal of Cytology. June 2015

Does Closure of the mesenteric defect during ante-colic bypass reduce the incidence of internal herniation. Sanmugalingam N, Nizar S, Vasilikostas G, Wan A. Int J Surg. Jan 2013

 Minimally Invasive vs Open Oesophagectomy for patients with oesophageal cancer: a multicenter, open label randomized controlled trial. Khan O, Nizar S, Vasilikostas G, Wan A.J Thoracic Dis 27 Oct 2012

T-regulatory cells; the evolution of immunotherapy. S Nizar, C Galustian, D Kumar, A Dalgleish. Biochemica et Biophysica Acta (Elsevier). Feb 23rd 2010.

Gemcitabine and Lenalidomide combination in a patient with metastatic cancer. WM Liu, S Nizar, AG Dalgleish. Med Oncol. May 12 2009

The modulation of T-regulatory cells: the future of cancer immunotherapy? S Nizar, D Kumar, AG Dalgleish. Br J Cancer. 2009 Jun 2;100(11):1697-703

Spoon Handle Aspiration. CL Dickinson, S Nizar, AC Wan, F Lee. Submitted to and Accepted by BMJ Case Reports. Published November 2008

The NHS bowel cancer screening programme - the evolution and the present. NJ West, S Nizar, RJ Leicester. Gastroenterology Today 2006;16(3)

Abdominal Compartment Syndrome: The Early Response to Laparostomy. S Nizar, Y Abdul-aal , S Wahed, T Rahman, K Marcus Reddy. Acta Clinica Belgica, -4-

Frimley Park NHS Foundation Trust.

Having played a lot of cricket and rugby, I enjoy following both sports avidly.

I have a love of music, having played the cello for my Medical School orchestra. Whenever possible I enjoy visiting the Royal Opera House with my wife to watch operas. I also enjoy listening to all kinds of music, especially when I operate. I have a particular affinity to rock music. I especially enjoy listening to music from groups such as Pink Floyd and Genesis, having seen them in concert.

Most of my weekends are spent helping my children with their activities. However, we manage to make time to work on our allotment as a family.

I also enjoy travelling around the world.