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A gastrointestinal stromal tumor is a rare type of cancer. It occurs in the gastrointestinal or digestive tract.

Aortic valve regurgitation is when the aortic valve leaks. The aortic valve is one of the heart's four valves. It is on the left side of the heart. It sits between the lower chamber (ventricle) and the large blood vessel that sends blood to the body (aorta).

Convergence insufficiency (CI) is a problem with the way the eye moves. It makes it hard to focus on things nearby. When the eyes converge, it means they point inward (toward the midline) to focus on something close. With CI, the eyes have trouble doing this. One eye may turn out instead of looking inward. CI can cause blurred vision, double vision, and eyestrain.

Corneal ring implantation is a type of eye surgery. It puts a small ring of plastic into the cornea. It is done to fix an eyesight problem, so you can see more clearly.

A fiberoptic evaluation of swallowing (FEES) test is used to see if you have dysphagia. Dysphagia is when you have trouble swallowing.

A dacryocystorhinostomy is a type of surgery. It’s done to make a new tear duct between your eyes and nose.

Ependymoma is a rare type of tumor of the brain or spinal cord. It can occur in both children and adults. In adults, it is often in the spinal cord. The tumor may not be cancer (benign), or it may be cancer.

Here are images that show the steps of hand washing.

See the 8 steps to measuring your blood pressure at home.