Oct 20th, 2020 - We're welcoming patients at Mayo Clinic See our safety precautions in response to COVID-19. Request an appointment. Overview Essential thrombocythemia (throm-boe-sie-THEE-me-uh) is an uncommon disorder in which your body produces too many platelets. Platelets are the part of your blood that sticks together to form clots. This condition may cause you to feel fatigued and lightheaded and to exper...

Oct 19th, 2020 - Overview The H1N1 flu, commonly known as swine flu, is primarily caused by the H1N1 and H3N2 strains of the flu (influenza) virus. Symptoms of the H1N1 flu are the same as those of the seasonal flu. In the spring of 2009, scientists recognized a particular strain of flu virus known as H1N1. This virus is a combination of viruses from pigs, birds and humans that causes disease in humans. During ...

Oct 14th, 2020 - Overview Influenza is a viral infection that attacks your respiratory system — your nose, throat and lungs. Influenza is commonly called the flu, but it's not the same as stomach "flu" viruses that cause diarrhea and vomiting. For most people, the flu resolves on its own. But sometimes, influenza and its complications can be deadly. People at higher risk of developing flu complications include:...

Oct 7th, 2020 - Diagnosis Some children with MIS-C test negative for a current infection with the COVID-19 virus. This means they don't currently have the virus that causes COVID-19. Yet evidence indicates that many of these children were infected with the COVID-19 virus in the recent past, as shown by positive antibody test results. An antibody test with a positive result means that the child's immune system ...

Oct 7th, 2020 - Overview Multisystem inflammatory syndrome in children (MIS-C) is a serious condition that appears to be linked to coronavirus disease 2019 (COVID-19). Most children who become infected with the COVID-19 virus have only a mild illness. But in children who go on to develop MIS-C, some organs and tissues — such as the heart, lungs, blood vessels, kidneys, digestive system, brain, skin or eyes — b...

Oct 5th, 2020 - We're welcoming patients at Mayo Clinic See our safety precautions in response to COVID-19. Request an appointment. Overview Persistent post-concussive symptoms, also called post-concussion syndrome, occurs when concussion symptoms last beyond the expected recovery period after the initial injury. The usual recovery period is weeks to months. These symptoms may include headaches, dizziness, and...

Sep 23rd, 2020 - Diagnosis Your doctor will conduct a physical exam, look for signs and symptoms of influenza, and possibly order a test that detects influenza viruses. During times when influenza is widespread, you may not need to be tested for influenza. Your doctor may diagnose you based on your signs and symptoms. In some cases, your doctor may suggest that you be tested for influenza. He or she may use var...

Sep 21st, 2020 - Overview Smallpox is a contagious, disfiguring and often deadly disease that has affected humans for thousands of years. Naturally occurring smallpox was wiped out worldwide by 1980 — the result of an unprecedented global immunization campaign. Samples of smallpox virus have been kept for research purposes. And advances in synthetic biology have made it possible to create smallpox from publishe...

Sep 18th, 2020 - We're welcoming patients at Mayo Clinic See our safety precautions in response to COVID-19. Request an appointment. Overview Spinal arteriovenous malformation (AVM) Open pop-up dialog box Close Spinal arteriovenous malformation (AVM) Spinal arteriovenous malformation (AVM) A spinal arteriovenous malformation (AVM) is an abnormal tangle of blood vessels on, in or near the spinal cord. Spinal art...

Sep 17th, 2020 - We're welcoming patients at Mayo Clinic See our safety precautions in response to COVID-19. Request an appointment. Overview Desmoplastic (des-moe-PLAS-tik) small round cell tumors are a type of soft tissue cancer that typically begins in the abdomen. Rarely, this type of cancer can occur in other parts of the body. Desmoplastic small round cell tumors occur most often in young men and boys, th...

Sep 16th, 2020 - We're welcoming patients at Mayo Clinic See our safety precautions in response to COVID-19. Request an appointment. Overview Nerve and damaged myelin sheath Open pop-up dialog box Close Nerve and damaged myelin sheath Nerve and damaged myelin sheath The demyelinating form of Guillain-Barre syndrome destroys the protective covering of the peripheral nerves (myelin sheath), preventing the nerves ...

Sep 15th, 2020 - We're welcoming patients at Mayo Clinic See our safety precautions in response to COVID-19. Request an appointment. Paraganglioma A paraganglioma is a rare tumor that begins in certain nerve cells that are dispersed throughout the body. This tumor can affect people of any age but most often shows up between the ages of 30 and 50. The tumor is often slow growing and noncancerous (benign). But it...

Sep 15th, 2020 - We're welcoming patients at Mayo Clinic See our safety precautions in response to COVID-19. Request an appointment. Overview Neuroendocrine tumors are cancers that begin in specialized cells called neuroendocrine cells. Neuroendocrine cells have traits similar to those of nerve cells and hormone-producing cells. Neuroendocrine tumors are rare and can occur anywhere in the body. Most neuroendocr...

Sep 14th, 2020 - We're welcoming patients at Mayo Clinic See our safety precautions in response to COVID-19. Request an appointment. Overview Parts of the throat (pharynx) Open pop-up dialog box Close Parts of the throat (pharynx) Parts of the throat (pharynx) The throat (pharynx) is a muscular tube that runs from the back of your nose down into your neck. It contains three sections: the nasopharynx, oropharynx...

Sep 10th, 2020 - Diagnosis If you develop symptoms of coronavirus disease 2019 (COVID-19) and you've been exposed to the COVID-19 virus, contact your doctor. Tell him or her if you've traveled to any areas with ongoing community spread of the COVID-19 virus according to CDC and WHO. Also let your doctor know if you've had close contact with anyone who has been diagnosed with COVID-19. Factors used to decide whe...

Sep 10th, 2020 - Overview Coronavirus Open pop-up dialog box Close Coronavirus Coronavirus Coronavirus is a family of viruses that can cause respiratory illnesses such as the common cold, severe acute respiratory syndrome (SARS) and Middle East respiratory syndrome (MERS). Coronaviruses are a family of viruses that can cause illnesses such as the common cold, severe acute respiratory syndrome (SARS) and Middle ...

Sep 9th, 2020 - We're welcoming patients at Mayo Clinic See our safety precautions in response to COVID-19. Request an appointment. Overview Multiple myeloma is a cancer that forms in a type of white blood cell called a plasma cell. Plasma cells help you fight infections by making antibodies that recognize and attack germs. Multiple myeloma causes cancer cells to accumulate in the bone marrow, where they crowd...

Sep 3rd, 2020 - We're welcoming patients at Mayo Clinic See our safety precautions in response to COVID-19. Request an appointment. Overview Hepatitis B is a serious liver infection caused by the hepatitis B virus (HBV). For some people, hepatitis B infection becomes chronic, meaning it lasts more than six months. Having chronic hepatitis B increases your risk of developing liver failure, liver cancer or cirrh...

Sep 1st, 2020 - We're welcoming patients at Mayo Clinic See our safety precautions in response to COVID-19. Request an appointment. Overview Mild cognitive impairment (MCI) is the stage between the expected cognitive decline of normal aging and the more serious decline of dementia. It's characterized by problems with memory, language, thinking or judgment. If you have mild cognitive impairment, you may be awar...

Aug 27th, 2020 - We're welcoming patients at Mayo Clinic See our safety precautions in response to COVID-19. Request an appointment. Overview A colon polyp is a small clump of cells that forms on the lining of the colon. Most colon polyps are harmless. But over time, some colon polyps can develop into colon cancer, which is often fatal when found in its later stages. There are two main categories of polyps, non...