Cervical rib
Cervical rib: An extra rib that arises from the seventh cervical vertebra. It is located above the normal first rib. A cervical rib is present in only about 1 in 200 people. It may cause pinching of nearby nerves or arteries, in which case it sometimes is removed surgically.
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- Cervical kyphosis, postmenopausal
Cervical kyphosis, postmenopausal: An outward curvature (kyphosis) of the cervical vertebrae (the bones of the neck), creating a hump at the back of the neck. This condition, once thought to be a characteristic deformity of older women, was called a dowager’s hump. A dowager was a woman of high social rank whose husband was dead […]
- Cervical intraepithelial neoplasia
Cervical intraepithelial neoplasia: The growth of abnormal precancerous cells on the surface of the cervix. Grades from one to three (least to most) may be used to describe the degree of involvement.
- Chagas disease
Ten to 20 years after infection, people may develop the most serious symptoms of Chagas disease. Cardiac problems, including an enlarged heart, altered heart rate or rhythm, heart failure, or cardiac arrest are symptoms of chronic disease. Chagas disease can also lead to enlargement of parts of the digestive tract, which result in severe constipation […]
- Chain-termination codon
Chain-termination codon: A set of three adjacent bases in the DNA or their complementary bases in messenger RNA that specifies the end of a polypeptide chain. The three chain-termination codons (in messenger RNA) are UAA, UAG, and UGA. They are also called termination codons, stop codons, or nonsense codons. U = uracil; A = adenine; […]
- Chalazion
A cyst of the little glands in the eyelids that make a lubricant which they discharge through tiny openings in the edges of the lids. The lubricant is a fatty substance called sebum characteristic of sebaceous glands. These glands are called the meibomian glands. Inflammation of them is termed meibomianitis or, alternatively, meibomitis. Chronic inflammation […]