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Cornea transplant
This procedure uses donor tissue to restore vision and reduce pain from cornea disease. Our overview helps you understand the risks and benefits of this sight-saving operation.
Combination birth control pills
This oral contraceptive contains both estrogen and progestin to keep you from ovulating. These medicines prevent pregnancy and can have other benefits.
Colectomy
If you're having colon surgery, learn what to expect, the risks and how to prepare.
Cochlear implants
This electronic device improves hearing in people who have severe hearing loss from inner ear damage.
Circumcision (male)
Learn about the benefits and risks of surgery to remove the skin that covers the tip of the penis.
Cholesterol test
Measuring the amount of cholesterol and triglycerides in your blood can help predict your risk of blocked arteries in your heart and brain.
Chemotherapy for breast cancer
Learn how doctors use this drug treatment to kill rapidly growing breast cancer cells. Find out about chemotherapy side effects and what you can expect.
Cataract surgery
Cataract surgery — Overview covers risks, complications, results of this eye surgery.
Carotid ultrasound
This test examines the blood flow through the arteries in the neck that deliver blood from the heart to the brain.
Carotid endarterectomy
This procedure removes plaque buildup in the carotid artery to help reduce your risk of stroke.
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