Weakness and fatigue of any of the muscles under one's voluntary control characterize myasthenia gravis. A breakdown in the normal communication between nerves and muscles is the cause of myasthenia gravis.
Signs and symptoms such as drooping eyelids, double vision, weakness of arm or leg muscles, and difficulties with breathing, swallowing, chewing and speech may be relieved by treatment, though there is no cure for ... more
Located near the knee joint is the bursa, which is a small fluid-filled, pad-like sac that reduces friction and cushions pressure points between the bones and the tendons and muscles near the joints. Knee bursitis is the inflammation of the bursa.
Each knee has 11 bursae. Knee bursitis most commonly occurs over the kneecap or on the inner side of the knee below the joint, despite the fact that any of the bursae could become ... more
A person may have high blood pressure for years without experiencing any signs or symptoms. The risk of serious health problems such as a stroke and a heart attack will be increased in case high blood pressure is not controlled.
The amount of blood the heart pumps and the amount of resistance to blood flow in the arteries determine a person's blood pressure. The higher the blood pressure will be, the more blood the heart pumps and ... more
Also called lactase deficiency, lactose intolerance is the condition in which a person won’t be able to fully digest the milk sugar (lactose) found in dairy products. Although this condition is usually not dangerous, however, its symptoms could be uncomfortable enough to steer a person clear of dairy products.
A deficiency of lactase, which is an enzyme that is produced by the lining of the small intestine, is the cause ... more
The cancer that begins in the retina, which is the sensitive lining on the inside of the eye, is called retinoblastoma. This cancer rarely occurs in adults, and it most commonly affects young children.
Nerve tissue that senses light as it comes through the front of the eye makes up the retina. In the brain, signals are interpreted as images after the retina sends these signals through the optic nerve to the brain.
Retinoblastoma is the ... more
The cancer that occurs in one of the salivary glands in the mouth, throat or neck is called salivary gland cancer. This type of cancer is rare.
A family history of salivary gland cancer, exposure to radiation and tobacco use could increase someone’s risk of this cancer. However, its exact cause is still not known.
People should pay attention to possible signs and symptoms, such as a painless lump, because ... more