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  3 Mount Elizabeth
Mt Elizabeth Medical Centre #07-08, Singapore 228510

Tel: +65 6836 5480
Fax: +65 6836 9523

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+65 6535 8833

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Can I Get Colon Cancer Before I'm 50?
In Singapore, data from the Cancer Registry showed that colorectal cancer is the most common cancer in males and the second most common cancer in females in the period 2006-2010. In the past five years ending 2010, there were 8,206 cases (up about 4 per cent) compared to 7,909 cases between 2005 and 2009. The age-standardized incidence rates (ASR) for both males and females has climbed consistently over the past three and a half decades since 1971. Amongst the ethnic groups, ASR is highest among the 中文 for both genders. Majority of the colorectal cancer cases are diagnosed at Stage 2 or late

This increasing incidence in colorectal cancer is postulated to parallel the demographic shift to an ageing population and poor dietary habit, particularly the consumption of red and processed meat, cigarette smoking and alcohol, as well as obesity and physical inactivity. Countries that have had a rapid ‘westernization’ of diet, such as Japan, have seen a rapid increase in the incidence of colorectal cancer. These ‘unhealthy diets’ are postulated to lead to an increase in DNA damage in the colonic cells that causes cancer formation.

Hence environmental factors, such as diet, play a significant role in the development of colorectal cancer. This explains why about 90% of cases were diagnosed at age 50 years or older, reflecting the length of time for exposure to undesirable environmental exposure before colorectal cancer develops. This means that up to 10% of colorectal cancer occurs in those who are fairly young, below the age of 50. In those who develop colorectal cancer before 50 years old, genetic factors rather than environmental factors are likely to play a bigger role. It is likely that a young person developing colorectal cancer has a genetic mutation that is inherited from birth, conferring a ‘head start’ in cancer development. An individual who has at least one of the following traits should consider genetic screening for colorectal cancer:

  • Strong family history of 3 of more colorectal cancers affecting 2 or more generations
  • Strong family history of multiple relatives with cancers in other organs such as the uterus, ovary, small intestine, bladder and kidneys
  • Personal of family history of colorectal cancer or polyps diagnosed before 50 years old
  • Family history with known hereditary conditions:
  • Familial Adenomatous Polyposis (FAP)
  • Lynch Syndrome
  • Puertz-Jegher’s Syndrome (PJS)
  • Cowden’s Syndrome
  • Multiple polyps in the colon, rectum or the rest of the gastrointestinal tract
  • Your managing physician believes there is a possible hereditary component to your colorectal cancer.

A genetic screening is an examination of a person’s genes to look out for patterns mutations that may indicate a genetic condition or to predict the chance that a person will develop a specific disease or condition in the future. A person found to have an increased risk of certain medical conditions would be better informed about the choices of preventive or therapeutic medical treatments for himself. Having the knowledge can empower a person and his affected family members to make significant life planning decisions that may affect the overall disease outcome, prognosis and the future health status of himself and his family.

Knowing about a certain disease gene may provide vital health/ medical information that could assist your doctor in more effectively planning for your clinical care or initiate preventive measures for at-risk individuals. The genetic test is a simple and non-invasive procedure, involving just drawing a small amount of blood from your arm. The blood sample will be sent for thorough lab testing and analysis.

What Are The Symptoms Of Colon Cancer?
Unfortunately, early cancers have no symptoms. By the time a patient with colorectal cancer presents with symptoms, 60% of them would be in the more advanced stages of cancer (stages 3 or 4). Some of these sinister symptoms include:
  • Change in bowel patterns
  • Blood or mucus in stools
  • Unexplained and persistent abdominal pain or distension/bloating
  • Unexplained loss of weight and appetite
How Can Colon Cancer Be Prevented?
Hence, it is important that those who are at risk undergo screening for colorectal cancer before any symptoms develop. Generally, screening with colonoscopy should start at 50 years old or 10 years younger than the age of onset of cancer in the family. In individuals with a strong family history defined as multiple first degree relatives with colorectal cancer or polyps or an individual in the family less than 60 years old, colonoscopy should start at 40 years old or 10 years younger than the youngest diagnosed individual in the family, whichever is earlier. Screening for colorectal cancer has been proven to save lives. In the United States and northern European countries, colorectal cancer mortality has been falling, and this has been attributed to screening, early detection and prevention by polyp removal before they turn cancerous.
What Other Important Information Should People Under 50 Be Aware Of WIth Regards To Colon Cancer?
Many patients and even physicians are complacent about colorectal cancer developing in people below the age of 50. This low index of suspicion often leads to a delay in presentation to a doctor and a possible delay in diagnosis. One of the youngest cases of colorectal cancer I have seen was a young lady of 18 years old. Despite being a healthcare professional, she erroneously attributed her abdominal distension and weight gain to “putting on weight”. It was only when her fellow colleagues asked if she was pregnant that she sought further evaluation. Unfortunately by then she was diagnosed to have stage 4 colon cancer with spread to several other organs and she succumbed to the disease 6 months later despite valiant efforts to remove the cancers. Another patient, Mr M, saw several doctors when he was just 27 years old for vague abdominal pain and bloating but was dismissed as just irritable bowel syndrome without further evaluation even though his symptoms were new and fairly persistent. Eventually he presented with complete colonic obstruction with perforation from a colon cancer 6 months later and had to undergo emergency surgery. Fortunately for him, despite the delayed diagnosis, he recovered well and is now happily married. These examples illustrate the high-index of suspicion needed in diagnosing colon cancer in the young.
How Are Colon And Rectal Cancers Treated?
Surgery for colorectal cancer is the only curative option. Depending on the size, location and stage of the cancer, radiotherapy and/or chemotherapy are sometimes needed to increase the chance of long term survival. A MRI (Magnetic Resonance Imaging) or CT scan is sometimes done before surgery to better demonstrate the anatomy of the tumor and its surrounding structure. Surgery can be performed via the traditional open approach (with a long cut/incision down the abdomen), laparoscopically (keyhole) or Robotically. Most tumors, unless they are very big, can be resected using the ‘key-hole’ approach, although the da Vinci Robotic systems offers superb dexterity and superior visualization for rectal cancers within the narrow confines of the pelvis.
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