

Medical Director & Senior Consultant Surgeon
B Med Sci (Nottingham), MBBS (Nottingham), MMed (Surgery), FRCS (Edinburgh), FAMS
Surgery plays a key role in the treatment of colorectal cancer, yet many people feel anxious about it due to common misconceptions. Concerns about severe pain, permanent stoma bags, prolonged recovery or even fears that surgery can cause cancer to spread are still widely shared, particularly among older individuals. While some of these beliefs may have stemmed from past practices, many are outdated or inaccurate in the context of modern surgical care.
Misconceptions regarding surgical treatment often stem from a blend of outdated information and cultural hesitation. Understanding the source of these myths is the first step toward making an informed, evidence-based decision for your health.
Whether a stoma is needed depends on several factors, including tumour location, cancer stage and the health of the surrounding tissues.
For cancers in the colon or upper rectum, surgeons can often reconnect the bowel and restore normal continuity. In some cases, a temporary stoma may be created to protect the reconnection and allow healing, with reversal planned at a later stage. A permanent stoma is usually considered only when the tumour is very low in the rectum or when reconnecting the bowel would not be safe.
Some people believe that surgery is only offered when colorectal cancer has reached an advanced stage. In reality, early detection often allows surgeons to remove the tumour completely before it spreads. For some early-stage cases, colorectal surgery alone may be sufficient without the need for additional treatment.
In more advanced cases, surgery remains a vital tool for alleviating symptoms, managing bowel obstructions, or reducing the overall tumour burden. While these interventions focus on improving quality of life, a delay in seeking evaluation can lead to acute clinical emergencies. Postponing a specialist consultation until symptoms are severe often limits the surgical techniques available and significantly increases the risk of post-operative complications.
Fear of intense pain is one of the most common reasons patients hesitate about surgery. Many people associate major operations with prolonged suffering based on past experiences or stories from others.
In reality, modern colorectal surgery incorporates structured pain control strategies from the start. Doctors use a combination of medications, regional anaesthesia techniques and enhanced recovery protocols to keep discomfort manageable. Most patients experience controlled, short-term discomfort rather than extreme pain, and the care team adjusts treatment promptly if pain arises.
Some people believe that colorectal surgery results in long-term disability or prolonged bed rest. This misconception often creates unnecessary fear about losing independence.
Recovery timelines vary based on the type of surgery, overall health and whether complications occur. Many patients resume light activities within 4 to 8 weeks. A structured recovery plan that includes gradual mobilisation, dietary guidance and regular follow-up supports steady progress. Most individuals can return to daily routines, social activities and work within a reasonable period.
Many may assume that older adults cannot safely undergo colorectal surgery. However, doctors assess overall health, functional status and medical conditions rather than age alone. With careful preoperative evaluation and appropriate perioperative care, many older patients tolerate surgery well and recover satisfactorily.

Some fear that surgery will result in lifelong incontinence or unpredictable bowel habits. However, bowel function often adjusts over time as the body adapts. Factors influencing function include tumour location, nerve involvement and extent of resection. Surgeons aim to preserve nerves and sphincter structures whenever possible. Pelvic floor rehabilitation and dietary guidance also support functional recovery.
People often worry that cutting into a tumour will cause cancer to spread. In reality, surgeons remove the primary tumour to reduce the overall cancer burden and improve disease control.
Modern colorectal surgical techniques prioritise careful tissue handling and controlled removal to minimise any risk of cell spread. Surgeons aim for clear margins and follow strict oncological principles throughout the procedure. Avoiding or delaying surgery because of this misconception can allow the cancer to progress and limit treatment options.
Colorectal cancer management does not rely on surgery alone. Doctors tailor colorectal cancer treatment based on the cancer stage, tumour characteristics and the patient's overall health. Chemotherapy, radiotherapy or other targeted therapies may be given before surgery to shrink the tumour or after surgery to reduce recurrence risk.
In selected cases where surgery is not suitable, doctors may recommend non-surgical treatment options. Each treatment plan is individualised following careful medical assessment. While surgery remains central for tumour removal in many cases, it's often part of a broader, coordinated care strategy.
Many people with a stoma continue to live full and active lives. With proper education and guidance, patients learn to manage stoma care confidently and discreetly. Quality of life depends more on adaptation, support and realistic expectations than on the presence of a stoma itself.
Post-surgical care is a continuous clinical process, not a one-time event. Scheduled imaging, blood tests, and colonoscopies allow your specialist to manage your long-term health and address any concerns before they escalate.
Ultimately, persistent symptoms such as blood in stool, abdominal pain, or changes in bowel habits require professional evaluation rather than self-diagnosis. Early specialist intervention provides a clear clinical path, ensuring that myths are replaced with an accurate diagnosis and an evidence-based treatment plan tailored to your recovery.
At Colorectal Practice, our Medical Director, Dr Dennis Koh, provides specialised expertise in proctology and minimally invasive surgical techniques. Supported by a compassionate team, he delivers comprehensive care ranging from preventive screenings to advanced robotic surgery across four major medical centres in Singapore.
If you require professional guidance or a second opinion, please message us at 6262 1226 or book an appointment via our website today.
Dr Dennis Koh
Medical Director & Senior Consultant Surgeon
B Med Sci (Nottingham), MBBS (Nottingham)
MMed (Surgery), FRCS (Edinburgh), FAMS
Dr Dennis Koh is a MOH-accredited and experienced colorectal surgeon with specialised expertise in the management and treatment of colorectal cancer; and currently the Medical Director at Colorectal Practice.
Dr Koh strives to provide a customized treatment plan for each patient, which allows for better outcomes. He also honed his skills in proctology abRd in Geneva, bringing a more diverse touch to his practice.
Dr Sharon Koh Zhiling
Senior Consultant Surgeon
MBBS (Singapore), MMed (Surgery),
FRCS (Edinburgh), FAMS
Dr Sharon Koh is an experienced colorectal surgeon and the former Director of Endoscopy at Alexandra Health. She has subspecialty training in colorectal surgery, minimally invasive surgery, and advanced endoscopy — particularly in the field of colorectal cancer.
Dr Koh completed her fellowship at Cedars-Sinai Medical Centre in the US after being awarded the Academic Medicine Development Award by the National University Hospital.
Dr Pauleon Tan Enjiu
Senior Consultant Surgeon
MBBS (Singapore), MMed (Surgery),
FRCS (Edinburgh), FACS
Dr Pauleon Tan has served in public hospitals for over 15 years and is experienced in minimally invasive surgery and endoscopy. He is also experienced in the treatment for colorectal cancer, and strives to provide the best possible care to his patients.
Dr Tan undertook advanced colorectal surgical training at Japan’s Saitama International Medical Center after being awarded the Ministry of Health – Health Manpower Development Plan (HMDP) Award.