Comprehensive care for digestive disorders by Dr. Akeel Alisa
A colonoscopy is a medical procedure that allows a gastroenterologist to examine the inside of the large intestine (colon and rectum) using a thin, flexible tube with a camera and light at the tip. This test provides clear, real-time images of the bowel lining and is one of the most accurate ways to detect abnormalities.
Colonoscopy is commonly performed to investigate symptoms such as rectal bleeding, changes in bowel habit, persistent diarrhoea, constipation, abdominal pain, or unexplained weight loss. It is also used for screening and prevention of bowel cancer, as it enables early detection and removal of polyps before they develop into cancer.
Gold standard for bowel cancer detection – Colonoscopy is the most
accurate test for identifying bowel cancer at its earliest stage.
Prevention through polyp removal – Polyps are small growths that
can develop into cancer over time. Colonoscopy allows them to be
removed immediately.
Direct visualisation – Unlike X-rays or scans, colonoscopy shows
the lining of the bowel in detail.
Biopsies can be taken – Small samples of tissue can be removed
painlessly for laboratory analysis.
Treatment during the same procedure – Polyps, bleeding points, and
some early cancers can be treated straightaway.
A colonoscopy may be recommended if you have:
To ensure clear visibility, the colon must be completely clean before the procedure. Preparation usually involves:
Your specialist will give you detailed instructions to make the preparation as smooth as possible.
The test is usually performed under sedation and pain relief, so
you remain comfortable and relaxed.
A colonoscope (a thin, flexible tube with a camera) is gently
passed into the rectum and guided through the entire colon.
The doctor carefully examines the lining, removes any polyps, and
may take biopsies.
The procedure typically takes 20–45 minutes.
Afterwards, you’ll be monitored until the sedative wears off and can usually go home the same day.
Colonoscopy is a very safe procedure, performed thousands of times each day in the UK.
Complications are rare but may include:
Minor bleeding after biopsy or polyp removal
Small risk of perforation (a tear in the bowel wall) – very
uncommon
Reactions to sedation
Your gastroenterologist will explain these risks in detail before the procedure.
Having your colonoscopy performed by an experienced consultant gastroenterologist ensures:
5.0 Rating on Doctify
Read testimonials from patients who have experienced Dr Alisa's expert care.
My consultation with Dr Akeel Alisa was highly satisfactory and he was very thorough. The Gastroscopy procedure was performed satisfactorily with no pain or discomfort at all. I am very pleased with treatment received so far.
Verified Patient
I was fully vaccinated investigated by Dr Akeel Alisa and I was reassured. My endoscopy and colonoscopy were straight forward and painless. I am very happy with the care I received.
Verified Patient
Dr Akeel Alisa and Nursing team at Cromwell Hospital Endoscopy team offered me great care and all was perfect. Well pleased.
Verified Patient
