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Doctor insights on: How Frequent Is Rectal Bleeding From Colon Cancer

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Do all colon cancer patients have rectal bleeding?

Do all colon cancer patients have rectal bleeding?

Not always.: Early in colon cancer, there are typically NO symptoms until the cancer tumor grows large enough that it begins to cause problems in the digestive tract. Small, asymptomatic cancers can be found by screening colonoscopy. Larger tumors may cause changes in bowel habits (diarrhea/constipation/change in consistency of stool), blood in stool, unexplained weight loss, weakness/fatigue, persistent pain ...Read more

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Dr. Barry Rosen
4,214 doctors shared insights

Cancer (Definition)

Cancer is a group of diseases that is characterized by uncontrolled cell growth leading to invasion of surrounding tissues that spread to other parts of the body. Cancer can begin anywhere in the body and is usually related to one or more genetic mutations that allow normal cells to become malignant by interfering with internal cellular control mechanisms, such as programmed cell death or by preventing ...Read more


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Had rectal bleeding for a few weeks 2.5 years ago. No bleeding since. Dr said it was likely fissure that healed. Would colon cancer continue to bleed?

Had rectal bleeding for a few weeks 2.5 years ago. No bleeding since. Dr said it was likely fissure that healed. Would colon cancer continue to bleed?

Colon cancer: Given your age and symptoms your doctor is probably correct. If you are not bleeding and not having symptoms i would not refer you for colonoscopy to evaluate for colon cancer. And yes, colon cancer would continue to bleed and would have caused multiple other symptoms by now. ...Read more

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24 yr old bright red rectal bleeding for a few weeks almost 3 years ago.No bleeding or symptoms since. Dr said ok.Would colon cancer continue to bleed?

24 yr old bright red rectal bleeding for a few weeks almost 3 years ago.No bleeding or symptoms since. Dr said ok.Would colon cancer continue to bleed?

No Rules: Unlikely that after all this time, there would be a cancer not causing symptoms. However, cancer does not follow rules. If there was bleeding, some evaluation should have been done, and maybe still should. ...Read more

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Has rectal bleeding when she is constipated. Can this be a sign of colon cancer?

Has rectal bleeding when she is constipated. Can this be a sign of colon cancer?

Eval: Possible causes include: fissures, fistulas, hemorrhoids, cancer, infections or inflammation. Although rough, dry stool could lead to hemorrhoids or bleeding - you can not just assume that is the reason for bleeding. Get evaluated if more than a one time occurence. ...Read more

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IFOBT test Dec 2014, no occult blood. April 2nd, 2015 minor rectal bleeding, stop 1 day after. April 17th, 2015 started again. I'm 22. Colon cancer?

IFOBT test Dec 2014, no occult blood.  April 2nd, 2015 minor rectal bleeding, stop 1 day after. April 17th, 2015 started again. I'm 22. Colon cancer?

Possibly hemorrhoids: most rectal bleed is usually from hemorrhoids, cancer is extremely rare especially at this age, but needs to be ruled out, therefore a specialist either general surgeon or gastroenterologist is necessary. ...Read more

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I don't drink alcohol at all and still have rectal bleeding, could I have colon cancer?

I don't drink alcohol at all and still have rectal bleeding, could I have colon cancer?

Maybe: Rectal bleeding is never normal. It always needs to be checked out by a physician. There are many causes of rectal bleeding. It could be something as simple as a hemorrhoid or something as serious as colon cancer. ...Read more

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Rectal bleeding. Thin stools. I'm 18 and have no cancer in my family! Is it safe to say that I DONT have colon cancer given my age and family history?

Rectal bleeding. Thin stools. I'm 18 and have no cancer in my family! Is it safe to say that I DONT have colon cancer given my age and family history?

Yes: it is unlikely that you have colon cancer but an evaluation is needed to see why you have rectal bleeding. You could have hemorrhoids or just be constipated. You should not have regular recital bleeding. ...Read more

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When colon cancer reach a level that causes anemia blood in stool became visible or stool became dark or rectal bleeding has started am I right?

When colon cancer reach a level that causes anemia blood in stool became visible or stool became dark or rectal bleeding has started am I right?

Not necessarily: Slow bleeding from colon cancer can lead to anemia, without visible blood or black tarry stools. More often than not, anemia is the presenting symptom, especially for right sided colon cancers. ...Read more

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Loosed/mushy stools for months, constant bloating, fatigue, loss of appetite & weight.No rectal bleeding or pain.Anxious about colon cancer.I'm 25.

Loosed/mushy stools for months, constant bloating, fatigue, loss of appetite & weight.No rectal bleeding or pain.Anxious about colon cancer.I'm 25.

Rare but possible: At 25 it would be very unusual to develop colorectal cancer and almost always would be related to an inherited family predisposition like having 2 or more first degree family members with colorectal cancer, ovarian or endometrial cancer or someone with a lot of polyps. At your age these symptoms are usually not cancer but you absolutely see your doctor for a check up ...Read more

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Dr. Eric Kaplan
921 doctors shared insights

Colon Cancer (Definition)

Final few yards of your intestine, between the terminal ileum (small bowell) and rectum. It squeezes water and solidifies waste to stool. It is subject to outpouching (divertics) polyps, and these can become cancers. The cells are abnormal, invade into the muscle and travel ...Read more


Dr. Andrew Seibert
1 doctor shared a insight

Colon (Definition)

The colon is another term for the large intestine. This is the final portion of the digestive system, responsible for absorbing water and storing stool before evacuation. It is divided into sections described as cecum; ascending, transverse, descending and ...Read more