Colorectal Cancer Symptoms: What to Watch For - Gastroenterology and Hepatology

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What are the symptoms of colorectal cancer?


Hello Dr.
Liu,
I would like to ask you about my mother.
Recently, she went to the hospital for a colonoscopy due to rectal bleeding, but only hemorrhoids were found.
However, her symptoms are somewhat similar to those of colorectal cancer.

1.
Weight loss...
but not continuous.
2.
Rectal bleeding...
the blood is not bright red but appears to be a mixture of dark liquid and fresh blood.
3.
The stool has become thinner.
These are my mother's symptoms, but she does not have the following conditions:
1.
Constipation
2.
Abdominal pain, bloating, or gas
3.
Anemia
4.
Abdominal mass
5.
Persistent fatigue
Given this situation, does she still fall into a high-risk group for colorectal cancer? My mother is scheduled for a colon examination on Monday, and I am very worried! Could you please explain my mother's condition? Thank you.

CH, 30~39 year old female. Ask Date: 2007/05/03

Dr. Liu Nanshan reply Gastroenterology and Hepatology


Colorectal cancer does not have specific symptoms; the symptoms you mentioned are all possible.
Clinically, rectal bleeding (which must be distinguished from hemorrhoidal bleeding) is common, and chronic iron deficiency anemia is the most frequent presentation.
Since your mother’s rectal bleeding is not bright red, it is advisable to perform a full colonoscopy, as a sigmoidoscopy alone may not provide a complete assessment.

Reply Date: 2007/05/03

More Info


Understanding the early symptoms of colorectal cancer is crucial, especially for individuals with a family history of the disease, as in your mother's case. Colorectal cancer can present with a variety of symptoms, many of which are non-specific and can overlap with other gastrointestinal conditions. Here’s a detailed overview of what to watch for and how to interpret these symptoms.


Common Symptoms of Colorectal Cancer
1. Changes in Bowel Habits: This includes persistent diarrhea or constipation, or a change in the consistency of your stool. For instance, if your mother has noticed her stools becoming thinner or more pencil-like, this could be a sign of a blockage or narrowing in the colon, which is often associated with tumors.

2. Blood in Stool: The presence of blood can be alarming. While bright red blood often indicates hemorrhoids or anal fissures, darker blood or a mixture of blood with stool can be more concerning and warrant further investigation. Your mother's description of blood resembling a mix of fresh blood and a thicker substance could suggest a more serious issue.

3. Unexplained Weight Loss: Significant weight loss without trying can be a warning sign of cancer. Although you mentioned that your mother has not experienced continuous weight loss, any unexplained changes in weight should be taken seriously.

4. Abdominal Discomfort: Symptoms such as persistent abdominal pain, cramping, or bloating can also indicate colorectal issues. However, your mother does not seem to be experiencing these symptoms, which is somewhat reassuring.

5. Fatigue and Weakness: Chronic fatigue can be a symptom of anemia, which may occur if there is ongoing blood loss from the gastrointestinal tract. While your mother does not report fatigue, it’s essential to monitor her energy levels.

6. Narrowing of the Stool: As previously mentioned, a change in the shape of the stool, particularly if it becomes thinner, can be a sign of a blockage in the colon.


Risk Factors and Family History
Given your mother's family history of colorectal issues, it’s important to consider her risk factors. A family history of colorectal cancer or polyps increases the likelihood of developing the disease. Regular screenings, such as colonoscopies, are vital for early detection, especially for those at higher risk.


Next Steps
Since your mother is scheduled for a colonoscopy, this is an excellent opportunity for a thorough examination of her colon. The colonoscopy will allow the physician to visualize the colon and rectum directly and take biopsies if necessary. It’s important to discuss all symptoms with her healthcare provider, including the nature of the blood in her stool and any changes in bowel habits.


Monitoring and Follow-Up
After the colonoscopy, it’s crucial to follow up with her healthcare provider to discuss the findings and any necessary next steps. If polyps are found, they may be removed during the procedure, and further monitoring may be required. If cancer is diagnosed, treatment options will depend on the stage of the disease and may include surgery, chemotherapy, or radiation therapy.


Conclusion
While your mother's symptoms may be concerning, they do not definitively indicate colorectal cancer, especially given the absence of several other common symptoms. The upcoming colonoscopy will provide clarity and is a proactive step in managing her health. Encourage her to maintain open communication with her healthcare team and to report any new or worsening symptoms promptly. Early detection and intervention are key in managing colorectal cancer effectively.

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