World-Class Colorectal Care
The London ColoRectal Clinic was established in 2008 with a simple philosophy: our patients come first.
Since then, we have built a reputation for delivering expert, compassionate, and personalised colorectal and abdominal surgery to patients from London, across the UK, and around the world.
We specialise in the diagnosis and treatment of:
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Colorectal (bowel) cancer
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Haemorrhoids
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Anal fissures and fistulae
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Inflammatory bowel disease (Crohn's disease and ulcerative colitis)
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Pelvic floor disorders
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Abdominal wall hernias
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Endometriosis affecting the bowel and pelvis
Whether you require a routine consultation, advanced investigation, a second opinion, or complex surgery, we are committed to providing clear advice, timely access to specialist care, and the highest standards of clinical excellence throughout your treatment journey.
Our Philosophy
Our Patients Come First
Everything we do is centred around delivering exceptional clinical care with compassion, integrity, and respect.
We understand that colorectal conditions can be worrying and, at times, difficult to discuss. Our aim is to make every patient feel comfortable, informed, and confident in their care.
Every treatment plan is tailored to the individual, combining the latest evidence-based medicine with a genuine commitment to outstanding patient experience.
Why Choose The London ColoRectal Clinic?
Choosing the right specialist is one of the most important healthcare decisions you can make.
At The London ColoRectal Clinic you benefit from:
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Over 20 years of consultant-level specialist experience
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Expertise in open, laparoscopic and robotic colorectal surgery
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Access to one of London's leading multidisciplinary colorectal teams
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State-of-the-art diagnostics and surgical technology
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Personalised treatment plans
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Rapid access to consultations and investigations
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Compassionate, patient-focused care
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Excellent clinical outcomes with international expertise
Our close collaboration with Cleveland Clinic London and King's College Hospital enables patients to access some of the UK's most advanced colorectal services.
The London ColoRectal Clinic is led by Mr Joseph W. Nunoo-Mensah, Consultant Colorectal, Laparoscopic and Robotic Surgeon at King's College Hospital and Cleveland Clinic London. With over 20 years of consultant-level experience, he is internationally recognised for his expertise in the diagnosis and treatment of colorectal cancer, inflammatory bowel disease, pelvic floor disorders, proctology, abdominal wall hernias, and advanced minimally invasive surgery.
Following specialist training in the United Kingdom, Mr Nunoo-Mensah undertook advanced fellowships at two of the world's leading surgical institutions: the Mayo Clinic, Arizona, and the University of Southern California, Los Angeles. This international experience, combined with an extensive UK practice, enables him to offer patients the very latest evidence-based surgical techniques alongside highly personalised care.
The London ColoRectal Clinic believes that exceptional patient outcomes are achieved through collaboration. We work closely with an experienced multidisciplinary team that includes gastroenterologists, radiologists, oncologists, gynaecologists, pelvic floor specialists, specialist nurses, physiotherapists, and allied healthcare professionals. Every patient benefits from an individualised treatment plan developed using the latest clinical evidence and best practice.
Patients are treated in some of London's leading private hospitals, with access to state-of-the-art diagnostic imaging, advanced endoscopy, robotic and laparoscopic surgery, and modern inpatient facilities. Our commitment is to deliver outstanding clinical outcomes within a professional, compassionate, and discreet environment where patients feel informed, supported, and confident throughout their care.
In addition to clinical practice, The London ColoRectal Clinic provides independent medico-legal services. Mr Nunoo-Mensah is an experienced expert witness who prepares objective, evidence-based reports for both Claimant and Defendant instructions involving colorectal and general surgical conditions. Reports are prepared in accordance with the Civil Procedure Rules and delivered within agreed timescales. We are pleased to provide no-obligation quotations outlining anticipated costs and reporting schedules.
Education, research, and innovation are fundamental to our philosophy. As an Honorary Senior Lecturer at King's College London, Mr Nunoo-Mensah is actively involved in postgraduate surgical education, clinical research, and international collaboration. He regularly teaches surgeons from around the world and contributes to the development of new techniques and best practice in colorectal surgery.
The clinic is also committed to advancing the specialty on a global scale. Mr Nunoo-Mensah is a Past President of the International Society of University Colon & Rectal Surgeons (ISUCRS) and founder of the internationally recognised Dilemmas & Debates in Colorectal Surgery (DDCRS) conference. Through these leadership roles, he continues to promote education, innovation, and excellence in colorectal surgery worldwide.
At The London ColoRectal Clinic, our mission extends beyond treating disease. We strive to set the highest standards in clinical care, education, research, and innovation—providing world-class colorectal care today while helping shape the future of colorectal surgery for generations to come.
Anorectal symptoms and complaints are common, arising from a wide range of conditions affecting the colon, rectum, and anus. While most issues are benign and can be effectively managed in outpatient settings, it is crucial to maintain a high index of suspicion for colorectal cancer. Proper evaluation and investigation are essential for all patients.
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Our practice specializes in diagnosing and treating patients with a variety of anorectal and colonic symptoms, including:
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Abdominal pain
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Anal pain
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Anal or rectal bleeding
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Rectal prolapse
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Itching around the anus
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Hemorrhoids (piles)
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Constipation or straining during bowel movements
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Diarrhea or frequent stools
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Fecal incontinence or soiling
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Passage of mucus or pus from the rectum or around the anus
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Presence of swelling or lumps in or around the anus
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What we have specialist and general interest
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Colon & rectal cancer (Bowel cancer) treatment
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Bowel cancer screening
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Diverticular disease
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Anal cancer
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Inflammatory bowel disease (Ulcerative colitis / Crohn's disease)
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Diverticular disease
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Haemorrhoids
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Anal fistula
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Anal fissures
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Pilonidal disease
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Abdominal wall hernia
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Endometriosis
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Our Approach
We provide advanced, minimally invasive, and laparoscopic surgical solutions for conditions such as:
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Colorectal cancer
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Diverticular disease and diverticulitis
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Crohn’s disease
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Ulcerative colitis
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Anal fistulae and fissures
CLEVELAND CLINIC FOUNDATION
Has a 100 year long history and is a non-profit, multi-disciplinary academic medical center for over 100 year.
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Globally, colorectal cancer (bowel cancer) is the third most common type of cancer and the second leading cause of cancer-related death.
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In 2022, the World Health Organization reported 1.93 million new colorectal cancer diagnoses, with approximately 900,000 deaths (46%) attributed to the disease (see Figure 1 below).
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The countries with the highest incidence rates are shown in Figure 2.
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Due to its large population, Asia accounts for approximately 50% of all diagnosed colorectal cancer cases (see Figure 3).
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In the UK, around 41,000 people are diagnosed with colorectal cancer each year, and approximately 16,000 people die from it annually.
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Most cases of bowel cancer (95%) occur in individuals over the age of 50, though it can develop at any age. Nevertheless, there is growing concern about the rising incidence of colorectal cancer in younger patients.
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The lifetime risk of developing bowel cancer is 1 in 14 for men and 1 in 19 for women.
Figure 1:
Figure 2:
Figure 3:
If you have risk factors for colon cancer or are concerned about symptoms suggestive of bowel cancer, we are more than happy to provide you with all the options available to you for screening or diagnostic testing. These include FIT (Faecal Immunochemical Test) stool test, colonoscopy or CT 'virtual' colonoscopy.
Symptoms suggestive of colorectal cancer.
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A change in bowel habits, such as diarrhoea, constipation or more-frequent bowel movements
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Dark maroon or bright red blood in stool
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Narrow stool
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A feeling that your bowel doesn't empty completely
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Abdominal pain
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Unexplained weight loss
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Weakness or fatigue
Unfortunately, symptoms have a poor correlation with the diagnosis of colorectal cancer, with a positive predictive value ranging from 5% to 15%.
The most effective way to prevent colorectal cancer is through preventative testing, such as a colonoscopy, which can detect and remove premalignant polyps.
Countries that utilize colonoscopy as a screening tool for the early detection of premalignant and malignant colorectal conditions have definitively demonstrated a reduction in both the incidence and subsequent mortality associated with the disease (See Figure 4).
Figure 4:
Please contact us if you would like more information or investigations.
For individuals with a family history of colorectal cancer or polyps, The London ColoRectal Practice offers a comprehensive bowel screening program tailored to your needs. Early detection and intervention are key to preventing serious complications and ensuring optimal outcomes.
What is the Pelvic Floor?
The pelvic floor is a complex group of muscles and connective tissues that forms a "basin" or "hammock" at the base of the pelvis. These muscles support the pelvic organs—including the bladder, bowel and, in women, the uterus—maintaining their normal position and allowing them to function properly.
When the pelvic floor becomes weakened, stretched or damaged, its ability to support these organs is compromised. This may occur as a result of childbirth, ageing, surgery, chronic straining, obesity, neurological conditions or other forms of pelvic injury. Loss of this support can lead to a wide range of pelvic floor disorders affecting bowel, bladder and sexual function.
The figure below illustrates the overlap between the pelvic organs and demonstrates why many pelvic floor disorders produce symptoms involving more than one organ system. Patients frequently experience a combination of bowel, bladder and pelvic symptoms rather than a single isolated problem.
How Common Are Pelvic Floor Disorders?
Pelvic floor disorders are among the most common long-term health conditions, yet they remain under-recognised and undertreated.
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UK population (2022): 67.8 million
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It is estimated that around 1 in 3 adults will experience a pelvic floor disorder during their lifetime.
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This equates to approximately 22 million people in the UK living with, or likely to develop, a pelvic floor disorder.
Despite affecting millions of people, pelvic floor disorders often remain undiagnosed because many patients feel embarrassed to discuss their symptoms or mistakenly believe they are a normal part of ageing or childbirth.
Early assessment by a specialist multidisciplinary pelvic floor team can significantly improve symptoms, quality of life and long-term outcomes.
Whether you have a simple abdominal wall hernia or a complex abdominal wall hernia, usually greater than 10 cm in size, we have the expertise to repair these. If appropriate, we can repair small hernias with minimally invasive surgery, allowing a quicker repair to occur. However, complex abdominal wall defects, especially those following GI surgery and incisional hernias, may require anterior or posterior component separations (ACS/PCS) for repair.
Every patient is unique, so Mr Nunoo-Mensah will offer you care and treatment tailored to meet your needs. If a wider multidisciplinary team is required to provide the best outcome, he works with dedicated plastic surgeons at Cleveland Clinic London, including Edmund Fitzgerald O'Connor, who specializes in plastic surgery and reconstructive surgery and may also recommend an abdomnoplasty to ensure an excellent outcome tailored to individual patient needs.
There is currently no cure for endometriosis. Endometriosis can be treated in several ways in order to reduce symptoms, improve quality of life, and improve fertility. The most common treatments for endometriosis that do not require surgery are hormone therapy and pain management. However, in the event surgery is required, it may involve excision (removal of the endometrial tissue using cutting) or ablation (destroying of the endometriosis cells using radiofrequency energy).
Cleveland Clinic London is proud to host some of the leading gynaecological surgeons in the country, including Ms Elizabeth Ball, with whom Mr Nunoo-Mensah collaborates closely to treat pelvic endometriosis that may involve the bowels. Contact us if you think you may have endometriosis or if you have a working diagnosis of simple or complicated endometriosis and would like to discuss your options.
It is important to consider short recovery time, a quick return to normal activity, low risk of complications and maintenance of functional outcomes when undergoing surgery for haemorrhoids, fistulas, or pilonidal disease. In order to achieve the best possible result, we are able to discuss with you minimally invasive procedures we perform. Below are some examples of these options:
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Laser surgery for anal fistula, haemorrhoids and pilonidal disease
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Other anal fistula surgery - including sphincter preservation techniques such as Permacol Paste Injection and BioLIFT procedures
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Other haemorrhoidal surgery including Haemorrhoid artery ligation surgery (HALS) and stapled haemorrhoidectomy (PPH) procedures
Laser surgery
Haemorrhoid artery ligation surgery
A wide range of colorectal diseases that previously required open surgery can now be diagnosed and treated with minimally invasive surgery at the London Colorectal Surgery . In addition to less postoperative pain and fewer major complications following surgery, minimally invasive surgery results in shorter hospital stays, faster recovery times, less scarring, less stress on the immune system, a smaller incision, and reduced operating time and costs for some procedures. We are y proud to offer:
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Laparoscopic (keyhole/minimal invasive) surgery
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Advanced laparoscopic surgical procedures including SILS – single incision laparoscopic surgery
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Trans endoscopic microsurgery for small rectal tumours
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Endoscopic mucosal resection of colorectal polyp
For investigating constipation and faecal incontinence we also offer:
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Anorectal physiology (manometry)
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3D endorectal ultrasound tests etc for investigating constipation and faecal incontinence
Other services:
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Colonoscopy & gastroscopy
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Bowel cancer screening
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Robotic Colorectal Surgery
CLEVELAND CLINIC LONDON
Cleveland Clinic Outpatient, 33 Grosvenor Pl, London SW1X 7HY
Cleveland Clinic Moorgate Outpatient Centre, 55 Moorgate, London, EC2R 6BH
Cleveland Clinic Portland Place Outpatient Centre, 24 Portland Pl, London W1B 1LU
GUTHRIE CLINIC
King's College Hospital, Denmark Hill, London SE5 9RS
Physical face-to-face consultation
A 30 min physical face-to-face consultation at our clinic for private insured patients and for self paying patients. The consultation cost for initial self paying patients will be £250. Follow-up appointments £200.
Virtual/Telephone Consultation
At The London Colorectal Clinic, we are now able to perform a telephone or web conference consultation.
The 30 min telephone or web consultations are £200 for self-paying patients.
If you are based in an EU/UK country we will opt to perform a virtual or telephone consultation. If you are based elsewhere abroad we will perform a virtual consultation.
Available Consultations
Tuesday 12:00 - 16:00 : Cleveland Clinic Moorgate Outpatient Centre, 55 Moorgate, London, EC2R 6BH
Wednesdays 18:00 - 20:00 : Guthrie Clinic, King's College Hospital, London, SE5 9AE
Thursdays 08:00 - 12:00 - Cleveland Clinic London, 33 Grosvenor Pl, London SW1X 7HY
Fridays 16:00-20:00 - Cleveland Clinic London, 33 Grosvenor Pl, London SW1X 7HY
Other adhoc appointment dates or times may be available on request.
To request an appointment
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If you have private health insurance please contact your provider to obtain authorisation for the consultation.
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Either fill in the form below and provide as much information or reports, test etc which will enhance the consultation or
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Contact Mr Nunoo-Mensah's PA Serena Ramzanal Tel: +44 (0) 203 423 7089, Mobile: +44 (0) 7514311196 or by email at jnunoomensmedsec@ccf.org
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We are a fee-assured provider with the majority of insurers and work with all the major insurance companies.
A competitive self-pay package that includes consultations, surgery, and inpatient care is also available. Please contact us if you would like a quotation for a procedure before consultation.
NHS waiting lists and waiting times are on the rise, and clinical treatment, tests, and surgery are delayed. The London Colorectal Clinic and Cleveland Clinic London are happy to assist you.
Are You Facing Any of These Challenges?
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Are you worried about having colorectal cancer?
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Are there delays in appointments to see your NHS GP?
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Do you want personalised individualised care?
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Do you want quicker diagnostic and treatment care?
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Are there delays in your investigations or are you on a long NHS waiting list to have a procedure?
How We Can Help
We offer:
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Prompt outpatient appointments tailored to your needs.
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Access to timely investigations and treatments.
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A multidisciplinary team at Cleveland Clinic London to review prior NHS treatments, investigations, and offer expert, comprehensive, individualised care.
You also have the flexibility to return to your regular NHS healthcare provider following your consultation or treatment with us.
Let us enhance your care while complementing the NHS services. Click the form below and complete it to get started. We look forward to assisting you.
Thank you for considering referring you patient to The London Colorectal Clinic.
To refer you patient either (Option 1) complete the online referral form HERE and upload any necessary information for the consultation or (Option 2) contact us my phone or mail.
PA to Mr Nunoo-Mensah
40 Grosvenor Place, London, SW1X 7AW
Tel: +44 (0) 203 423 7622
Mobile: +44 (0) 7513 712440
Email: jnunoomensmedsec@ccf.org
Independent, Objective Expert Opinion
Mr Joseph Nunoo-Mensah is a Consultant Colorectal and General Surgeon with over 27 years of consultant surgical experience, providing independent medico-legal opinions in colorectal and general surgery for solicitors, insurers, healthcare organisations and the Courts throughout the United Kingdom.
He accepts instructions on behalf of:
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Claimants
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Defendants
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Joint Experts
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NHS Resolution
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Medical Defence Organisations
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Coroners
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Regulatory Bodies
All reports are prepared in accordance with Civil Procedure Rules (CPR Part 35) and reflect an independent, balanced and evidence-based opinion.
Why Instruct Mr Joseph Nunoo-Mensah?
Extensive Clinical Experience
Over 27 years of consultant practice in colorectal and general surgery, managing the full spectrum of benign, malignant and emergency colorectal conditions, including complex and advanced surgical cases.
Medico-Legal Expertise
Mr Nunoo-Mensah holds a Master of Laws (LLM) in the Legal Aspects of Medical Practice, providing an in-depth understanding of medico-legal principles, expert witness responsibilities and the Civil Procedure Rules.
Evidence-Based Opinion
Every report is based on current medical literature, national guidelines, accepted surgical practice and a comprehensive review of the available clinical records. Opinions are objective, balanced and scientifically robust.
Independent and Impartial
An expert witness's overriding duty is to assist the Court. Mr Nunoo-Mensah accepts instructions from both claimant and defendant solicitors and applies the same independent, rigorous and impartial analytical approach to every case.
Clear and Accessible Reports
Reports are written in clear, logical language that explains complex surgical issues in a manner that is readily understood by solicitors, barristers and the Court.
The London ColoRectal Clinic actively participates together with other educational bodies in organising surgical skills courses and providing educational materials for medical doctors and other related professionals.
Course include:
Conferences include:
SUMMARY
Mr. Joseph Nunoo-Mensah is a distinguished colorectal surgeon, renowned for his exceptional expertise in colorectal cancer, inflammatory bowel disease, pelvic floor disorders, and advanced proctology, including the management of complex fistulae and haemorrhoids. He holds dual appointments at the Cleveland Clinic London and King’s College Hospital NHS Foundation Trust, where he continues to advance patient care and medical innovation.
In his practice, Mr. Nunoo-Mensah is able to offer state-of-the-art, current treatments, including minimally invasive laparoscopic abdominal and robotic surgery.
He completed his medical training at Queen’s Medical School, University of Nottingham, earning dual degrees in Medical Science and Medicine & Surgery in 1993. His surgical journey includes foundational training at John Radcliffe Hospital, Oxford, and advanced surgical training in Manchester. He holds fellowships from the Royal College of Surgeons of England (FRCS and FRCS Gen Surg) and obtained his Certification of Completion of Training (CCT) in General Surgery in 2008. Mr. Nunoo-Mensah pursued advanced laparoscopic surgery training at the Mayo Clinic, Arizona, and specialized colorectal disease training at the University of Southern California. Simultaneously, he completed a Master’s degree in Legal Aspects of Medical Practice from Cardiff University.
Since 2008, he has served at King’s College Hospital as a colorectal surgeon and head of the colorectal surgery department, overseeing the colorectal cancer multidisciplinary team and anorectal physiology laboratory. Additionally, he is an Honorary Senior Lecturer at King’s College London, contributing to postgraduate education and research.
Mr. Nunoo-Mensah is the founder and Program Director of the Dilemmas and Debates in Colorectal Surgery Conference at King’s College London. He is the immediate past president of the International Society of University Colon and Rectal Surgeons (2022-2024). His contributions include extensive publications in leading surgical journals, authorship of key surgical textbook chapters, and presentations at global conferences.
A passionate educator, he has trained surgical residents and fellows in the UK and internationally, including as a clinical instructor at the University of Southern California and as a lead trainer for the UK’s National Laparoscopic Colorectal Surgery Training Programme.
Residing in London with his wife, Mr. Nunoo-Mensah enjoys traveling, playing touch rugby, and advancing the field of colorectal surgery through clinical practice, research, and education.
Mr Joseph Nunoo-Mensah
Consultant Colorectal & Laparoscopic Surgeon
Alison Walker
Company Director
Serena Ramzanali
PA (Cleveland Clinic London)
Tolu Salako
Educational Diector
Get inTouch
PRIVATE PATIENTS
Serena Ramzanali
PA to Mr Nunoo-Mensah
40 Grosvenor Place, London, SW1X 7AW
Tel: +44 (0) 203 423 7622 (ext 37622)
Mobile: +44 (0) 7514311196
Email: jnunoomensmedsec@ccf.org
MEDICO-LEGAL INQUIRIES
Department of Colorectal Surgery
Hambleden Wing West- 2nd Floor
King’s College Hospital
Denmark Hill
London, SE5 9RS
Email: jnunoomensmedsec@ccf.org
NHS PATIENTS
Email: kch-tr.colorectalsecretaries@nhs.net
