Pratique du Shadowing: Who's at risk for colon cancer? - Amit H. Sachdev and Frank G. Gress - Apprendre l'anglais à l'oral avec YouTube

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If you were to lay your digestive tract out in a straight line, it would form a tube spanning nearly ten meters.
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If you were to lay your digestive tract out in a straight line, it would form a tube spanning nearly ten meters.
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The last 1.5 meters of that are called the colon, or large intestine.
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Cells in this organ's lining constantly renew themselves, but the genes that moderate this process occasionally go awry, leading to the excessive growth of new cells.
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That results in small growths or abnormal clumps of cells called polyps.
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The majority of these polyps won't do any harm, but some can become cancerous when their cells begin to grow and divide rapidly, projecting further into the colon.
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At that point, they can transform into colon cancer, one of the most prevalent and preventable forms of cancer in the world.
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That's a slow process: though growth times vary, it often takes around ten years for a small polyp to grow and develop into a cancerous one.
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We don't know exactly what causes the majority of colon polyps and colon cancers.
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We do know in general that colon cancer involves the activation of what's called oncogenes in the polyp, and/or the loss of tumor-suppressor genes that usually keep cancer cells in check.
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Most cells have proto-oncogenes that help them grow.
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When a proto-oncogene mutates, or there are two many copies of it, it can become a permanently active oncogene with cells that grow out of control.
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While we don't yet know exactly what underlying factors cause these changes, experts suspect a combination of both environmental and inherited genetic factors.
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In the worst cases, when cells within polyps divide and spread unchecked, they eventually break through the lining of the colon.
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Lymph and blood vessels carry those cells all over the body, and they can go on to form tumors.
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Despite these challenges, there's a solution.
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We've become extremely good at detecting and removing offending polyps before they can cause cancer.
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This happens through a process called screening, and when we do it regularly, we can prevent many cases of colon cancer.
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So, who's at risk?
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Most cases occur in people aged 50 years or older.
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This group is considered at average risk for colon cancer or colon polyps.
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There's also a higher risk group that includes people with personal or family histories of colon polyps or cancer, and those who suffer from inherited genetic syndromes, or inflammatory diseases, like Crohn’s disease and ulcerative colitis.
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So the best age to initiate screening varies from person to person.
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If you have access to healthcare, it's best to consult a doctor to find out when you should begin.
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Screening can be done with various tests.
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Colonoscopy involves a long, thin, flexible tube that's fitted with a video camera and light at the end and placed internally to examine the colon for polyps.
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If polyps are found, a doctor can do a polypectomy, a procedure that removes polyps from the colonic wall.
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Doctors can also then test the polyp for cancerous cells.
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Colonoscopy is the only test that can be used to both find and remove polyps.
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There are, however, other useful screening tests, including imaging and at-home tests that can allow patients to examine their stool for small amounts of blood.
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Occasionally, polyps are too large to be removed during a colonoscopy, in which case, the next step is surgery.
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If blood and imaging tests then reveal that cancerous cells have spread outside the colon, then a special treatment, like chemotherapy, may also be required to stop the cancer from escalating.
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We can also take on certain habits to reduce our likelihood of developing colon cancer in the first place.
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There's evidence that maintaining a healthy weight, not smoking, and being physically active can help.
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But most importantly, access to healthcare and regular screenings at crucial times in life are the best ways to prevent colon cancer.

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Context & Background

In the enlightening discussion led by Dr. Amit H. Sachdev and Dr. Frank G. Gress, the intricate details surrounding colon cancer are explored, highlighting the significance of understanding this prevalent health issue. They delve into the anatomy of the digestive system, explaining the colon's role and the process through which polyps may form and eventually lead to cancer. By unpacking complex medical terminology and concepts, these experts create an informative narrative that aims to raise awareness about risk factors, screening methods, and preventative strategies associated with colon cancer. This context is beneficial not just for healthcare professionals but also for English learners who wish to enhance their medical vocabulary and comprehension skills.

Top 5 Phrases for Daily Communication

  • “Colon cancer is one of the most prevalent and preventable forms of cancer.” - A powerful statement emphasizing the importance of awareness and prevention.
  • “The majority of these polyps won't do any harm.” - A reassuring phrase that can be useful in health-related conversations.
  • “Consult a doctor to find out when you should begin.” - This phrase reinforces the importance of seeking professional advice.
  • “Regular screenings can prevent many cases of colon cancer.” - A reminder of the value of preventative health measures.
  • “Maintain a healthy weight and be physically active.” - General wellness advice applicable to various contexts.

Step-by-step Shadowing Guide

To maximize your learning from this video, utilize the shadowing technique. Follow this step-by-step guide to enhance your English pronunciation and speaking skills effectively through shadow speaks.

  1. Watch the video: Begin by watching the entire video without any interruptions. This initial viewing will give you context and an understanding of the topic.
  2. Listen carefully: During the second viewing, pay close attention to the speakers’ pronunciation, intonation, and speech patterns.
  3. Choose segments: Select short, manageable segments of the video to focus on. This can be a few sentences or a single thought that resonates with you.
  4. Practice shadowing: Play the segment and imitate the speakers. Repeat phrases immediately after hearing them. Use this shadowspeak practice to enhance fluency and natural flow.
  5. Record yourself: As you practice, record your voice. Compare it with the original audio to identify areas for improvement.
  6. Review and repeat: Regularly revisit the video, focusing on different sections each time to continually refine your pronunciation and understanding.

By incorporating these techniques into your learning routine, you can effectively improve English pronunciation while gaining insightful knowledge about important health topics. Remember, consistent practice is key to mastering both language and content.

Qu'est-ce que la technique du Shadowing ?

Le Shadowing est une technique d'apprentissage des langues fondée sur la science, développée à l'origine pour la formation des interprètes professionnels. Le principe est simple mais puissant : vous écoutez de l'anglais natif et le répétez immédiatement à voix haute — comme une ombre suivant le locuteur avec un décalage de 1 à 2 secondes. Les recherches montrent une amélioration significative de la précision de la prononciation, de l'intonation, du rythme, des liaisons, de la compréhension orale et de la fluidité.

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