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Doctor insights on: Does Narrow Stools Mean You Have Colon Cancer

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Dr. Barry Rosen
4,351 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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I did a CT scan came back negative for diverticulitis but showed a narrowing of the colon. 3cm. Other organs are ok. Does it mean I have colon cancer? I have no blood in stool but I had two episode of complete blockage with vomiting. Colonoscopy next

I did a CT scan came back negative for diverticulitis but showed a narrowing of the colon. 3cm. Other organs are ok. Does it mean I have colon cancer? I have no blood in stool but I had two episode of complete blockage with vomiting. Colonoscopy next

Colonoscopy: Colonoscopy, that you planning, should settle the issue.
Wish you good health!
Have a diet rich in fresh vegetables, fruits, whole grains, milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Drink enough water daily, so that your urine is mostly colorless. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form.
Practice safe sex, if you have sex. ...Read more

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Do narrow stools always indicate colon cancer?

Do narrow stools always indicate colon cancer?

No: More commonly due to spasm in lower colon. However, sudden change in stool caliber, "pencil thin" stools, cramps, bleeding, nausea, weight loss need evaluation. Ongoing symptoms need evaluation. At the least, this should involve a doctor visit, perhaps other tests. ...Read more

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Does having pencil thin stool mean I have colon cancer?

Does having pencil thin stool mean I have colon cancer?

For how long?: Anybody can pass a thin one from time to time. If this persists for more than a few days, go in and get a rectal from your physician. It's more worrisome to have the caliber decreasing gradually over time. ...Read more

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I have blood in my stools sometimes, does that mean I have colon cancer?

I have blood in my stools sometimes, does that mean I have colon cancer?

No, that is just one: Possiblity. Most likely is hemorroids, then infections, inflammatory bowel disease, diverticulosis, angiodysplasia. But you are right, the most deadly is cancer, so have it checked out. ...Read more

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What to do if I have blood in my stools sometimes, does that nescesarily mean I have colon cancer?

What to do if I have blood in my stools sometimes, does that nescesarily mean I have colon cancer?

No: Most common cause of bleeding with stool is hemorrhoids. One cannot really tell the cause of bleeding by history alone and people with recurrent bleeding need to have colonoscopy to ensure they do not have any cancer. ...Read more

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If 'pencil' stool and 'narrow' stool are signs of colon cancer but exactly how thin of the stool consider as pencil stool or narrow?

If 'pencil' stool and 'narrow' stool are signs of colon cancer but exactly how thin of the stool consider as pencil stool or narrow?

Any change.: Any change in stool caliber warrants investigation. If one's stool has changed in size (narrow), to any degree, a colonoscopy is warranted. This could be an early sign of colon caner. ...Read more

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Can watery stool mean I have colon cancer?

Can watery stool mean I have colon cancer?

Unlikely: It would be very, very unlikely at the age of 16 to have colon cancer. Watery stools would most likely be related to a viral illness that should last no more than 5-7 days. ...Read more

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Please help docs! Is my stool red mean I have colon cancer?

Please help docs! Is my stool red mean I have colon cancer?

Not always. : But red stool could mean blood and blood in the stool could be due to cancer. Please see your doctor about this matter promptly even if the stools go back to normal. ...Read more

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If it feels like my colon is full still after I use the washroom, can that mean be normal? I heard of colon cancer, but stool seems normal. No pain.

If it feels like my colon is full still after I use the washroom, can that mean be normal? I heard of colon cancer, but stool seems normal. No pain.

May be normal: The reservoir of the large bowel is transverse colon and not rectum. One may not be fully emptying that site if having normal BM. The final solution is in colonoscopy where if nothing seen on complete scoping, this would rule out Ca. If such occurs the symptoms may be arising in small bowel and at that point TCT of abdomen would be helpful ...Read more

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What happens if I have tested negative for blood in my stool, does it mean I cannot have colon cancer?

What happens if I have tested negative for blood in my stool, does it mean I cannot have colon cancer?

No true correlation: Stool guaiac to define blood in stool of little value since many tumors do not bleed especially those on the rt. side where bowel content is mostly liquid and will not extract blood from a tumor. In addition, internal hemorrhoids can bleed and as such no correlation to malignancy. Colonoscopy every 5 yrs looking for bowel lesions is the most effective screening test at the present time. ...Read more

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I saw blood in my stool and I'm completely freaked out. What could it mean? There is colon cancer in the family.

I saw blood in my stool and I'm completely freaked out. What could it mean? There is colon cancer in the family.

Probably: Just hemorrhoids, but with a family history, all bleeding needs to be properly evaluated, and you probably need a colonoscopy. Do not be freaked out as it does nothing to change your diagnosis, but you at least need a diagnosis. Remember, if caught early by colonoscopy, survival is excellent. See a GI doctor or colon and rectal surgeon soon! ...Read more

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Does green stool means cancer? I sometimes have this problem along with pellet like stool and constipation. Does this mean colon cancer?

Does green stool means cancer? I sometimes have this problem along with pellet like stool and constipation. Does this mean colon cancer?

No: Color of stool is affected by your diet. It does not mean one has colon cancer. However, if you see bright red blood/bleeding in your stool- then you should see your doctor for more evaluation to see where is the source of the bleeding. You definitely need to make sure you hydrate (drink water) yourself and increase intake of fibers to help your constipation. ...Read more

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What does mean when your stool is almost black all the time I am a colon cancer survivor, but when they discover my cancer my stool was regular color but there was blood around it on the outside and I was feeling very week, now I feel fine but the stool

Need to discuss: Need to discuss this further. You are 33, clearly have a genetic predisposition to colon cancer, have already had surgery and now with black stool.

Black stool usually signifies blood from the upper abdominal tract — stomach, duodenum, small intestine.

You should definitely not leave this alone and speak with a specialist regarding this further. ...Read more

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Yellow narrow stool, but not always narrow with a lot of mucus and sometimes blood. Is this colon cancer?

Yellow narrow stool, but not always narrow with a lot of mucus and sometimes blood.  Is this colon cancer?

Bowel caliber/color: Any change in the caliber or color of stool should be evaluated with colonocscopy. ...Read more

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How accurate % Is the schebo stool test in colon cancer? I mean how can it miss a tumor since it decects bleeding and nonbleeding tumors

How accurate % Is the schebo stool test in colon cancer? I mean how can it miss a tumor since it decects bleeding and nonbleeding tumors

Schebo colon ca test: ScheBo tumor M2-PK Stool Test is a totally new approach for bowel cancer screening. Previously, only non-specific tests for blood in the stool could be used to give an indication of an existing bowel cancer (24% accuracy). With the new ELISA method for Tumor marker M2-PK in the stool it?s now possible to detect bleeding or non-bleeding bowel cancers, as well as polyps (80-90%,sen.- specificity) ...Read more

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23. F No cancer history. Since 2 days inconsistency in BM. I go once a day but find hard to release. Lil narrow stools. Got gas.no blood Colon cancer?

23. F No cancer history. Since 2 days inconsistency in BM. I go once a day but find hard to release. Lil narrow stools. Got gas.no blood Colon cancer?

Unlikely: A diagnosis of cancer of the intestines at 23 yr of age is very unusual. If you are constipated and there is larger piece of stool blocking passage of stool, this may cause thinner stools. Try to have more fiber in your diet and stay hydrated. ...Read more

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I'm 22 with freah blood in stool occassionally no other symptoms chances it means I may have colon cancer?

I'm 22 with freah blood in stool occassionally no other symptoms chances it means I may have colon cancer?

No: The commonest cause of painless rectal bleeding in a young individual is internal hemorrhoids. You should see your pcp who can do proctodscopy and see if the hemorrhoids are bleeding. He can then decide whether you need colonoscopy or a colorectal surgeon for treatment of bleeding hemorrhoids. ...Read more

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I have been having lower back pain, and pain in my right side. Along with narrow stools quite frequently. Could these be related? Colon Cancer?

I have been having lower back pain, and pain in my right side. Along with narrow stools quite frequently. Could these be related? Colon Cancer?

Um: Colon cancer could be but not the first thing to consider. You could have urinary issues, stones, infection, irritable bowel. I would see your doctor for a full history and physical. Good luck ...Read more

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Chance that 4 CT scans over 2 1/2 years would all miss sympotomatic colon cancer (narrow stool, occasion blood), also sigmoidscope to 35 cm.

Fairly high risk: CT scans are NOT good tools for looking inside the bowel. Endoscopy is the preferred tool, but a sigmoidoscopy, at its best, misses looking at half the colon. A look to merely 35 cm has missed about 85-90% of the colon. The usual method to evaluate the colon is a complete colonoscopy. ...Read more

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Would symptomatic colon cancer be missed on 3 separate CT scans? I am only 37 but have had narrow stools and small amounts of blood for past year.

Would symptomatic colon cancer be missed on 3 separate CT scans? I am only 37 but have had narrow stools and small amounts of blood for past year.

Unlikely : Best test would be a colonoscopy for your symptoms or at least a sigmoidoscopy. Usually if a colon cancer had symptoms a year ago those symptoms would have progressed over the ensuing 12 months and by now it would have been obvious by your symptoms and ct scan. ...Read more

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Had red blood, black stool 3 weeks ago for 3 days. Had hemiglobin and occult test 2 days ago and all normal. This does mean I have no colon cancer?

Had red blood, black stool 3 weeks ago for 3 days.  Had hemiglobin and occult test 2 days ago and all normal.  This does mean I have no colon cancer?

GI consult, EGD: Limited data available as reported. Colon cancer is rare at such a young age. Bright red blood usually from lower GI tract, or hemorrhoids, fissure etc. However black stoll is concerning for upper GI bleed. Need a GI/Gastroenterology evaluation, EGD/upper endoscopy, H Pylori testing, Upper GI series etc. contact PCP for GI referral. Go to a health tap doctor for a formal consult with more details ...Read more

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Does bright red blood with stool most likely mean colon cancer? My anus area feel itchy afterwards im 22 what are my realistic chance of colon cancer at 22? I have no family history

Does bright red blood with stool most likely mean colon cancer? My anus area feel itchy afterwards im 22 what are my realistic chance of colon cancer at 22? I have no family history

Need an exam: Colon cancer is less common at your age. Sounds more like ananal fissure. Try increasing fiber to avoid constipation. This will help if this is a hemorrhoid too. See your doctor if it continues. He/she can make a recommendation once a definitve diagnosis is made. ...Read more

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28 yrs old, male. Do narrow stools always indicate colon cancer or are there other reasons? No blood in stool. Bloating and gas.

28 yrs old, male. Do narrow stools always indicate colon cancer or are there other reasons? No blood in stool.  Bloating and gas.

No – but what's up?: And narrowed caliber of stool can be commonly associated with colon carcinoma in any age group. It relates to the relative constriction of the rectum prior to evacuation. Other conditions include rectal stenosis, a sizable rectal polyp, or other conditions serving to narrow and constricted the normal sized stool. Best let a gastroenterologist evaluate you by colonoscopy and anoscopy. ...Read more

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Chance 4 ab / pelvic CT scans all missed symptomatic colon cancer (narrow stools, occaision blood) over three years. Also, had sigmoidosopy to 35cm?

Chance 4 ab / pelvic CT scans all missed symptomatic colon cancer (narrow stools, occaision blood) over three years. Also, had sigmoidosopy to 35cm?

Hematochexia: Negative sigmoidoscopy and CT sacn of pelvis and Abdomen. May need a full colonoscopy doubt colon cancer for 3 years without significant progression. Other cause like IBD more likely ...Read more

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Been having thin/narrow stools. Clear rectal exam by gp/no blood in stool. Should I fear colon cancer? I'm 39 &had adenocarcinoma insitu of cervix 4yrago

Been having thin/narrow stools. Clear rectal exam by gp/no blood in stool. Should I fear colon cancer? I'm 39 &had adenocarcinoma insitu of cervix 4yrago

Possible lesion: In situ adeno unrelated unless some for of radiation employed that could narrow distal bowel. Narrowing of stool suggests that there is some constriction of bowel causing a narrowing of the lumen and thus the stool. Blood does not have to be present but relying on a gp rectal not satisfactory. Sigmoidoscopy at a minimum and colonoscopy more accepted for this problem. ...Read more

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Does colon cancer always make your stools bloody?

Maybe: If having bleeding you should be checked for colon cancer or other problems that can cause bleeding. However, you could have colon cancer without any visible signs of bleeding. If you are hi risk, get screened! ...Read more

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Is it possible to have normal stool with colon cancer?

Is it possible to have normal stool with colon cancer?

Yes!: Most colon Cancers may not show up in or effect your stool till it is late and quite advanced(enough to narrow or block the lumen of the colon. If there is sufficient risk of colon cancer, then Colonoscopy is the best way to check for Colon Cancer provided the person is 50 years or older(this is the age to begin screening for Colon cancer in an asymptomatic person). ...Read more

Dr. Patricia Foster
13 doctors shared insights

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


Dr. Ronald Krauser
12 doctors shared insights

Colonic (Definition)

This is a combining term referring to some condition, treatment or disease of the colon. Such as colonic enema, colonic ...Read more