Screenings are tests that look for diseases before you have symptoms. Screening tests can find diseases early, when they're easier to treat. You can get some screenings in your doctor's office. Others need special equipment, so you may need to go to a different office or clinic.

Some conditions that doctors commonly screen for include:

• Breast cancer and cervical cancer in women
• Colorectal cancer
• Diabetes
• High blood pressure
• High cholesterol
• Osteoporosis
• Overweight and obesity
• Prostate cancer in men

Which tests you need depends on your age, your sex, your family history, and whether you have risk factors for certain diseases. After a screening test, ask when you will get the results and whom to talk to about them.

Agency for Healthcare Research and Quality

The tissue that lines your lungs, stomach, heart, and other organs is called mesothelium. Mesothelioma, also known as malignant mesothelioma, is cancer of that tissue. It usually starts in the lungs, but can also start in the abdomen or other organs.

Malignant mesothelioma is rare but serious. Most people who get it have worked or lived in places where they inhaled or swallowed asbestos particles. After being exposed to asbestos, it usually takes a long time for the disease to form.

Symptoms include:

• Trouble breathing
• Cough
• Pain under the rib cage
• Pain, swelling, or lumps in the abdomen
• Weight loss for no known reason
• Blood clots
• Constipation
• Fatigue

Sometimes it is hard to tell the difference between malignant mesothelioma and lung cancer. To find out if you have mesothelioma, your health care provider will likely use a physical exam, imaging tests, and a biopsy.

Malignant mesothelioma is often found when it is advanced. This makes it harder to treat. Treatment options may include:

• Surgery
• Radiation therapy
• Chemotherapy
• Immunotherapy
• Targeted therapy, which uses drugs or other substances that attack specific cancer cells with less harm to normal cells

NIH: National Cancer Institute

Breast diseases include various conditions and changes in your breast. Most women experience breast changes at some time. Your age, hormone levels, and medicines you take may cause lumps, bumps, and discharges of fluids that are not breast milk.

Although many women fear cancer, most breast changes are benign, meaning they are not cancer. These breast changes are known as benign breast disease. See your health care provider if you have a breast lump, pain, discharge, or skin irritation. Minor and serious breast problems often have similar symptoms and may need treatment.

Common breast changes and conditions can include:

• Fibrocystic breast changes can include lumpiness, thickening, and swelling, often just before your period. Your breasts may feel painful, swollen, or tender.
• Cysts are fluid-filled lumps that may be tender.
• Fibroadenomas are solid, round, rubbery lumps that easily move when pushed, occurring most in younger women.
• Intraductal papillomas are wart-like benign tumors that grow in the milk duct of the breast.
• Blocked milk ducts.
• Milk production when you're not breastfeeding.

Symptoms depend on the type of breast disease. Benign breast diseases may not have any symptoms, or they could include:

• A lump or firm feeling in your breast or under your arm
• A change in the size or shape of your breast
• Nipple discharge
• Skin changes such as itching, redness or darkening, dimples, scaling, or puckering on your breast or nipple
• Painful, swollen, or tender breasts

See your provider if you're noticing any of these symptoms or other unusual changes. Some symptoms may be warning signs or symptoms of breast cancer.

Some breast changes may be felt or seen. You may notice a change in your breast, or your provider may notice it during a clinical breast exam. Other breast changes may only be found during a screening mammogram or other imaging tests such as an MRI or ultrasound. Your provider may also recommend a breast biopsy to check a suspicious change in your breast.

Some benign breast changes may increase your risk of breast cancer in the future and may need treatment now. Treatment depends on the type of breast disease that you have. Some breast changes may go away without treatment, while others may require monitoring, biopsy, or surgery.

NIH: National Cancer Institute

A polyp is an extra piece of tissue that grows inside your body. Colonic polyps grow in the large intestine, or colon. Most polyps are not dangerous. However, some polyps may turn into cancer or already be cancer. To be safe, doctors remove polyps and test them. Polyps can be removed when a doctor examines the inside of the large intestine during a colonoscopy.

Anyone can get polyps, but certain people are more likely than others. You may have a greater chance of getting polyps if you :

• Are over age 50
• Have had polyps before
• Have a family member with polyps
• Have a family history of colon cancer

Most colon polyps do not cause symptoms. If you have symptoms, they may include blood on your underwear or on toilet paper after a bowel movement, blood in your stool, or constipation or diarrhea lasting more than a week.

NIH: National Institute of Diabetes and Digestive and Kidney Diseases

Electric and magnetic fields (EMFs), also called radiation, are areas of energy that surround electrical devices. Everyday sources of EMFs include:

• Power lines
• Electrical wiring
• Microwave ovens
• Computers
• Cell phones

Some people worry about EMF exposure and cancer. Some studies have found a link between EMF exposure and a higher risk of childhood leukemia, but other studies have not. Other studies have not found proof that EMF exposure causes other childhood cancers. Studies in adults did not prove that EMF exposure causes cancer.

Some people worry that cell (wireless) phones cause cancer or other health problems. The phones do give off radiofrequency energy (RF), a form of electromagnetic radiation. So far, scientific evidence has not found a link between cell phone use and health problems in humans. However, scientists need to do more research on this before they can say for sure. If you are worried about avoiding any possible risks, you can limit your exposure by:

• Reducing the amount of time you spend using your cell phone
• Use speaker mode or a headset to place more distance between your head and the cell phone

NIH: National Institute of Environmental Health Sciences