While in many cases, there are no obvious symptoms with colon cancer, there are some that can be warning signs and should be discussed with your physician. These include: Any major change in bowel habits. Blood in the stool that is either bright red, black or tarry.
Rectal bleeding is the most obvious colon cancer symptom, but there are other, more subtle signs, like learning you're anemic. It may be the first sign that you're bleeding internally. Other signs are you can't catch your breath, you feel bloated or crampy and you have severe constipation.
Signs and symptoms
The 3 main symptoms of bowel cancer are blood in the stools (faeces), changes in bowel habit – such as more frequent, looser stools – and abdominal (tummy) pain. However, these symptoms are very common and most people with them do not have bowel cancer.
Colon cancer can cause changes in the color, consistency, and frequency of your poop. These changes can include blood in the stool, narrow stools, more frequent bowel movements, and diarrhea. In advanced stages, poop may become black and tarry.
The symptoms of bowel (colorectal) cancer can include: bleeding from the back passage (rectum) or blood in your poo. a change in your normal bowel habit, such as looser poo, pooing more often or constipation. a lump that your doctor can feel in your back passage or tummy (abdomen), more commonly on the right side.
Sometimes colon cancer can cause fatigue due to internal blood loss from the disease. In many cases, the symptoms of colon cancer are connected. Other colon cancer symptoms, such as unintentional weight loss and a change in bowel habits, can increase the feeling of weakness.
If there are symptoms, the following may indicate colon cancer: Abdominal pain and tenderness in the lower abdomen. Blood in the stool. Diarrhea, constipation, or other change in bowel habits.
Early-stage colon cancer often does not present any signs or symptoms — which is why regular screening is critical, especially for patients who have risk factors or a family history of the disease.
Colon cancer is typically slow-growing, starting as a benign polyp that eventually becomes malignant. This process may occur over many years without producing any symptoms. Once colon cancer has developed, it may still be years before it is detected.
The most common tumor marker for colorectal cancer is carcinoembryonic antigen (CEA). Blood tests for this tumor marker can sometimes suggest someone might have colorectal cancer, but they can't be used alone to screen for or diagnose cancer.
Stool tests.
Currently, three types of stool tests are approved by the US Food and Drug Administration (FDA) to screen for colorectal cancer: guaiac FOBT (gFOBT); the fecal immunochemical (or immunohistochemical) test (FIT, also known as iFOBT); and multitargeted stool DNA testing (also known as FIT-DNA).
Most colorectal cancers start as a growth on the inner lining of the colon or rectum. These growths are called polyps. Some types of polyps can change into cancer over time (usually many years), but not all polyps become cancer. The chance of a polyp turning into cancer depends on the type of polyp it is.
Pantel says, “you should get checked out if you have rectal bleeding, if you have any change in your bowel habits, any change in appetite (like feeling “full” early), weight loss, or abdominal pain that is not explained.” Your symptoms may be different than those of someone you know who had colorectal cancer.
In most cases, colon and rectal cancers grow slowly over many years.
A change in bowel habits. Blood in or on your stool (bowel movement). Diarrhea, constipation, or feeling that the bowel does not empty all the way. Abdominal pain, aches, or cramps that don't go away.
There are many common conditions that can affect the health of our bowels, and many have symptoms similar to bowel cancer. These conditions include (but aren't limited to) piles (haemorrhoids), irritable bowel syndrome (IBS), anal fissures, inflammatory bowel disease (IBD), diverticular disease, and diarrhoea.
Tell your doctor or specialist nurse if you're worried about a symptom or if it continues for more than a few days. General symptoms of advanced bowel cancer can include: feeling tired. low energy levels.
Though not as common, a person may experience excessive smelly gas due to the presence of cancer of the colon. Cancerous polyps or tumors can form blockages that cause gas to build up in the intestine. One early warning sign is when changes in diet or medication do not stop foul-smelling gas from occurring.
The risk of colorectal cancer increases as people get older. Colorectal cancer can occur in young adults and teenagers, but the majority of colorectal cancers occur in people older than 50. For colon cancer, the average age at the time of diagnosis for men is 68 and for women is 72.