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9 Topic Pages Found in Health & Medicine and starting with the letter U
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ulcer

open sore or circumscribed erosion, usually slow to heal, on the skin or mucous membranes. It may develop as a result of injury; because of a

Ulcerative colitis

What Is It? Ulcerative colitis is an inflammatory disease. It usually begins in the rectum, then worsens to involve some or all of the large

Open ultrasound
ultrasound

Pressure waves, known as ultrasonic waves, similar in nature to sound waves but occurring at frequencies above 20,000 Hz (cycles per second), the

Umbilical cord prolapse

Umbilical cord prolapse occurs when the cord slips out through the cervix, before the baby, after the bag of water has broken. When cord prolapse

urinalysis

( yʊr´´ənăl'ĭsĭs ), clinical examination of urine for the purpose of medical diagnosis. Urine is initially examined for such characteristics as color,

urinary system

group of organs of the body concerned with excretion of urine, that is, water and the waste products of metabolism. In humans, the kidneys are two

Urinary Tract Infections

Infections of the urinary tract are the most common of all bacterial infections, and cause significant morbidity worldwide. The urinary system

Open Uterine Fibroids
Uterine Fibroids

What Is It? A fibroid is a lump or growth in the uterus that is not cancerous. Fibroids can be as small as a pea to as large as a basketball. They are

Open Uterus
Uterus

in most female mammals, hollow muscular organ in which the fetus develops and from which it is delivered at the end of pregnancy . The human uterus is