Cancer is the uncontrolled growth of abnormal cells anywhere in a body. These abnormal cells are termed cancer cells, malignant cells, or tumor cells. These cells can infiltrate normal body tissues. Many cancers and the abnormal cells that compose the cancer tissue are further identified by the name of the tissue that the abnormal cells originated from (for example, breast cancer, lung cancer, colorectal cancer). Cancer is not confined to humans; animals and other living organisms can get cancer. Below is a schematic that shows normal cell division and how when a cell is damaged or altered without repair to its system, the cell usually dies.
Today, people are living longer than ever after a cancer diagnosis due to improved cancer screenings. Routine screenings catch diseases earlier, when they are more straightforward to treat.
Unexplained Weight Loss
When you lose weight for no reason, call your doctor. A loss of 10 pounds or more could be nothing to worry about. However, in rare cases, it may be the first sign of cancer.
Fatigue
This isn’t fatigue similar to how you feel after a long day of work or play. Extreme fatigue that doesn’t get better with rest can be an early sign of cancer.
Cancer uses your body’s nutrients to grow and advance, so those nutrients are no longer replenishing your body. This “nutrient theft” can make you feel extremely tired.
There are lots of underlying causes of fatigue, many of them not cancer-related. If your symptoms are severe enough to affect your quality of life, call your doctor.
Fever
Fever can be a common symptom of colds and the flu, and clears up on its own.
Certain characteristics of recurring fever can foretell a possible cancer connection. You should pay particular attention if:
- A fever happens mostly at night.
- You have no other signs of infection.
- You experience night sweats.
Pain
Pain is another symptom that can be caused by a multitude of health issues, most of which are not cancer. But persistent pain, can also hint at an underlying disease.
Cancer can cause pain in different ways, including:
- A mass or tumor pushing on other areas of your body
- The chemicals a cancer releases
- Metastasis, or spreading from where a cancer started
If you’re experiencing pain that doesn’t go away — and you’re not sure where it came from — your doctor can help with the best next steps.
Skin Changes
Our skin is the largest organ of our body and can be a window into our overall health. Jaundice (yellowing of eyes or fingertips) is one symptom that could suggest a possible infection or cancer. Contact your doctor if you notice any signs of jaundice.
Changes in moles can also be cause for concern. Call your doctor if a mole:
- Is asymmetrical, or has jagged edges
- Has irregular borders
- Changes color or gets darker
- Is large or growing.
- HOW TO PREVENT CANCER.
- 1. Don't use tobaccoUsing any type of tobacco puts you on a collision course with cancer. Smoking has been linked to various types of cancer — including cancer of the lung, mouth, throat, larynx, pancreas, bladder, cervix and kidney. Chewing tobacco has been linked to cancer of the oral cavity and pancreas. Even if you don't use tobacco, exposure to secondhand smoke might increase your risk of lung cancer.Avoiding tobacco — or deciding to stop using it — is an important part of cancer prevention. If you need help quitting tobacco, ask your doctor about stop-smoking products and other strategies for quitting.2. Eat a healthy dietAlthough making healthy selections at the grocery store and at mealtime can't guarantee cancer prevention, it might reduce your risk. Consider these guidelines:
- Eat plenty of fruits and vegetables. Base your diet on fruits, vegetables and other foods from plant sources — such as whole grains and beans.
- Maintain a healthy weight. Eat lighter and leaner by choosing fewer high-calorie foods, including refined sugars and fat from animal sources.
- If you choose to drink alcohol, do so only in moderation The risk of various types of cancer — including cancer of the breast, colon, lung, kidney and liver — increases with the amount of alcohol you drink and the length of time you've been drinking regularly.
- Limit processed meats. A report from the International Agency for Research on Cancer, the cancer agency of the World Health Organization, concluded that eating large amounts of processed meat can slightly increase the risk of certain types of cancer.
In addition, women who eat a Mediterranean diet supplemented with extra-virgin olive oil and mixed nuts might have a reduced risk of breast cancer. The Mediterranean diet focuses mostly on plant-based foods, such as fruits and vegetables, whole grains, legumes, and nuts. People who follow the Mediterranean diet choose healthy fats, such as olive oil, over butter and fish instead of red meat.3. Maintain a healthy weight and be physically activeMaintaining a healthy weight might lower the risk of various types of cancer, including cancer of the breast, prostate, lung, colon and kidney.Physical activity counts, too. In addition to helping you control your weight, physical activity on its own might lower the risk of breast cancer and colon cancer.Adults who participate in any amount of physical activity gain some health benefits. But for substantial health benefits, strive to get at least 150 minutes a week of moderate aerobic activity or 75 minutes a week of vigorous aerobic activity. You can also do a combination of moderate and vigorous activity. As a general goal, include at least 30 minutes of physical activity in your daily routine — and if you can do more, even better.4. Protect yourself from the sunSkin cancer is one of the most common kinds of cancer — and one of the most preventable. Try these tips:- Avoid midday sun. Stay out of the sun between 10 a.m. and 4 p.m., when the sun's rays are strongest.
- Stay in the shade. When you're outdoors, stay in the shade as much as possible. Sunglasses and a broad-brimmed hat help, too.
- Cover exposed areas. Wear tightly woven, loose fitting clothing that covers as much of your skin as possible. Opt for bright or dark colors, which reflect more ultraviolet radiation than do pastels or bleached cotton.
- Don't skimp on sunscreen. Use a broad-spectrum sunscreen with an SPF of at least 30, even on cloudy days. Apply sunscreen generously, and reapply every two hours — or more often if you're swimming or perspiring.
- Avoid tanning beds and sunlamps. These are just as damaging as natural sunlight.
5. Get vaccinatedCancer prevention includes protection from certain viral infections. Talk to your doctor about vaccination against:- Hepatitis B. Hepatitis B can increase the risk of developing liver cancer. The hepatitis B vaccine is recommended for certain adults at high risk — such as adults who are sexually active but not in a mutually monogamous relationship, people with sexually transmitted infections, people who use intravenous drugs, men who have sex with men, and health care or public safety workers who might be exposed to infected blood or body fluids.
- Human papillomavirus (HPV). HPV is a sexually transmitted virus that can lead to cervical and other genital cancers as well as squamous cell cancers of the head and neck. The HPV vaccine is recommended for girls and boys ages 11 and 12. The U.S. Food and Drug Administration recently approved the use of vaccine Gardasil 9 for males and females ages 9 to 45.
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