Qu'est-ce que le cancer colorectal ?

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## What is Colorectal Cancer?

Colorectal cancer is a type of cancer that ‍starts in the colon or rectum. It can occur at any age, but it is ‍most common in ⁢people over 50. Here’s a comprehensive overview of this disease:


Colorectal cancer often does not cause symptoms in its early stages. As the cancer grows, symptoms may develop, ‍including:

– Persistent changes in bowel habits, such as diarrhea, constipation, or narrowing of stools

– Rectal bleeding or blood in stools

– Abdominal pain, cramps, or bloating

– ‌Weight loss ​and fatigue

– Weakness or anemia


The exact cause of colorectal cancer is ⁢unknown, but there⁣ are certain⁤ risk factors that increase the likelihood of‍ developing ‍this⁣ condition, including:

– **Age:** The risk of ⁣colorectal cancer increases with age, especially after 50.

– **Family⁢ history:** Having a close relative with colorectal cancer⁣ increases your risk.

– **Diet:** Diets​ high in red and processed meats, low in fiber, and high in saturated ⁣fats contribute to an increased risk.

– **Obesity:** Obese individuals have a higher risk of developing colorectal cancer.

– **Smoking:** Smoking increases the⁣ risk of​ colorectal cancer.

– **Genetics:** Some inherited genetic conditions, ​such as Lynch syndrome, increase the risk of colorectal cancer.

– **Ulcerative colitis and Crohn’s disease:** These inflammatory⁤ bowel diseases are associated with an increased risk of colorectal cancer.


Colorectal cancer can be diagnosed through various tests, including:

– **Colonoscopy:** A thin, lighted ⁣tube is inserted into the rectum and colon to visualize the lining.

– **Flexible sigmoidoscopy:** A shorter version of a colonoscopy that examines the lower part of the colon.

– **Virtual colonoscopy:** ⁣CT scans are used to create ‌detailed images of the colon and rectum.

– **Blood tests:** Some blood tests can indicate the presence of substances⁣ associated with colorectal cancer.


The appropriate treatment for colorectal cancer depends on the stage⁤ and ⁤location of the tumor. Options ⁣may include:

– **Surgery:** To remove the tumor and nearby lymph nodes.

– **Radiation therapy:** To kill cancer cells or shrink ⁢tumors.

– **Chemotherapy:** To use​ drugs to destroy cancer ‌cells.

-‍ **Immunotherapy:**‍ To boost the body’s ‍immune response against⁢ cancer.

-​ **Targeted therapy:** To use drugs that target specific proteins or molecules involved in cancer growth.


Colorectal cancer can be prevented or its risk reduced by following these recommendations:

– **Get regular screenings:** Adults​ over​ 50⁤ should get screened for⁤ colorectal ⁢cancer through colonoscopies or other⁤ tests.

– **Maintain a⁤ healthy weight:** Obesity ⁢increases the risk of colorectal cancer.

– **Adopt a healthy diet:** Eat a diet rich in fruits, vegetables, and whole grains.

– **Quit smoking:** Smoking is a major risk factor for⁣ colorectal cancer.

– **Limit ​alcohol consumption:** Excessive alcohol intake can increase the risk of colorectal cancer.

– ⁢**Manage inflammatory⁣ bowel diseases:** ‍Individuals with ulcerative colitis or Crohn’s disease should undergo regular monitoring and follow prescribed ‌treatments to reduce the‍ risk ⁢of⁤ colorectal cancer.

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  1. Colorectal cancer is the third leading cause of cancer-related deaths in the United States. It is a cancer that starts in the large intestine or rectum. Colorectal cancer can be prevented, detected, and treated if it is found early.

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