With 2 clinics located in Central London and 2 in North-West London, Dr Arun Rajendran takes pride in offering expert, friendly, and effective care for a comprehensive range of conditions affecting the gullet, stomach, colon, and liver.
mailgastro@pm.me
London clinic and Onewelbeck
BMI The Clementine Churchill Hospital
OSD Healthcare
Expert care for bowel cancer — from early diagnosis to advanced treatment with personalised support throughout.
Specialist gastroenterologist, London.
Patient Reviews.
Compassionate Specialist Care
Gastroenterology London
Bowel cancer — also known as colorectal cancer, develops in the large bowel, which includes the colon and rectum. It is one of the most common cancers in the UK, often beginning as small, non-cancerous polyps that can develop into cancer over time.
When bowel cancer is caught early, it is highly treatable. Prompt assessment and specialist care make all the difference.
4th most common cancer in the UK
Over 90% of cases occur in people aged 50 and over
Early-stage survival rate can be as high as 95%
Bowel cancer is treatable and curable, especially when diagnosed early.
Bowel cancer typically develops through a combination of genetics, lifestyle, and diet.
A family history of bowel cancer or an inherited condition increases your risk.
The vast majority of bowel cancer cases in the UK are diagnosed in people aged 50 and over.
A diet high in red or processed meat, low in fibre, a sedentary lifestyle, and obesity all increase bowel cancer risk.
Long-term inflammatory bowel diseases, such as Crohn's disease or ulcerative colitis, elevate the risk.
Long-term smoking and excessive alcohol consumption are each independently associated with an increased risk of bowel cancer.
Some bowel polyps can slowly develop into cancer over time, which is why early detection and removal are important.
Early signs of bowel cancer can be subtle. Knowing what to look
for means you can seek help sooner.
Persistent diarrhoea, constipation, or unusual stools lasting more than a few weeks.
Bright red or dark blood — always warrants specialist investigation.
Losing weight without trying, particularly alongside other bowel symptoms.
Ongoing cramping, bloating, or discomfort in the stomach area that does not resolve.
Persistent tiredness, often linked to anaemia from slow bowel bleeding.
A persistent sensation that the bowel has not fully emptied after going to the toilet.
If you notice blood in your stools, a change in bowel habits lasting more than three weeks, unexplained weight loss, or persistent abdominal pain — do not wait.
Concerned about bowel cancer symptoms?
An early consultation with Dr Arun Rajendran could make all the difference.
Dr Arun Rajendran uses the latest diagnostic tools to deliver accurate, timely results in a private setting.
Review of symptoms, medications, diet, and medical history to identify patterns and triggers.
A non-invasive test checking for hidden blood in the stool, which is often the earliest detectable sign.
A flexible camera examines the full bowel. Polyps can be removed during the same procedure.
A detailed CT scan producing a 3D image of the colon, useful where colonoscopy is not suitable.
Tissue samples confirm cancer; CT and MRI scans determine whether it has spread.
Treatment depends on the stage and your individual circumstances.
Dr Rajendran works with a multidisciplinary team to deliver personalised, evidence-based care.
Removal of the cancerous bowel section; Keyhole surgery where possible; Polypectomy during colonoscopy for early-stage cancer.
Chemotherapy to destroy/shrink cancer cells; Radiotherapy targets cancer cells with precision; Targeted therapy and immunotherapy for advanced subtypes.
Nutritional support and pain management; Psychological counselling; Regular follow-up colonoscopies.
Simple everyday choices can meaningfully reduce your risk and support long-term bowel health.
Eat plenty of fibre — fruit, vegetables, wholegrains, and pulses.
Limit red and processed meats.
Stay well hydrated — aim for 6–8 glasses of water daily.
A Mediterranean-style diet is associated with reduced risk.
Aim for 30 minutes of moderate activity most days.
Maintain a healthy weight — modest weight loss reduces risk.
Stop smoking and keep alcohol within recommended limits.
Discuss all medications with your doctor, including OTC pain relief.
Take part in bowel cancer screening if you are over 50.
Ask your doctor about earlier surveillance if you have a family history.
Report any new or persistent bowel symptoms promptly.
With over a decade of experience, Dr Arun provides expert, friendly gastro care, listening carefully and offering personalised attention because you deserve more than a rushed appointment.
Thorough investigation before treatment, with a clear explanation in plain English.
Every plan is built around your specific diagnosis and lifestyle, not a generic protocol.
Continued follow-up, flare-up management, and access to a wider specialist network across London.
Conveniently located across central and south London, often available within days.
Thousands of patients across London and the UK have trusted
Dr Arun Rajendran to get to the bottom of their digestive symptoms.
We are a self-pay clinic but also accept all major UK healthcare insurance providers.
Our London Clinic Locations
20 Devonshire Place, London, W1G 6BW (Wed: 17:45 – 19:30).
Welbeck Street, London, W1G 0AR (Mon: 18:00 – 20:00).
Sudbury Hill, Harrow, HA1 3RX
(Tue 18:00–20:00 · Alt Sat 08:30–10:30).
One Medical House, Hemel Hempstead, HP2 7YU
(Saturday: 09:00 – 11:00).
