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Corticosteroid medicines—also called steroid medicines—are similar to natural hormones produced in the body that help control many

Congenital heart disease refers to structural heart problems or abnormalities that have been present since birth. These problems

Contact dermatitis is inflammation of the skin caused by contact with a substance that causes an allergic reaction. Or it can

Conjunctivitis is infection or irritation of the mucous membrane that lines the inner surface of the eyelids and part of the front

A cyst is a sac-shaped structure in the body. Cysts usually are filled with fluid, which may be blood, clear fluid, or pus. A cyst

Cyanotic congenital heart disease includes abnormal openings between the heart chambers that allow oxygen-poor blood from the

Crohn's disease is a lifelong inflammatory bowel disease. It causes swelling, inflammation, and deep sores in the lining of your

Creatinine is a waste product formed by the breakdown of a substance (creatine) important for converting food into energy

Cervicitis is an inflammation of the cervix, most often caused by infection. Symptoms of cervicitis include an unusual vaginal

Cortisol is a hormone produced by the adrenal glands, which are located just above the kidneys. Cortisol affects almost every