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Ulcerative colitis
This is a chronic inflammation affecting the innermost lining of the large intestine (colon) and rectum. Ulcerative colitis occurs only through continuous stretches of your colon. It is characterized by abdominal pain and diarrhea
Ultrasonography (ultrasound)
A procedure which uses high-energy sound waves (ultrasound) that travels from a transducer through the skin and into the body, where sound bounces off internal structures, creating echoes.These echo patterns are shown on the screen of an ultrasound machine, forming a picture of body tissues called a sonogram. Also called a ultrasound.
Ultrasound-guided biopsy
A procedure that uses ultrasound imaging to guide the health professional's instrument to the site of the abnormal growth to obtain a biopsy.
Undifferentiated (poorly differentiated)
A term used to describe tumor cells which lack the structures and function of normal cells and grow uncontrollably. The opposite are well- differentiated tumor cells, which resemble normal cells and tend to grow and spread at a slower rate than the undifferentiated (poorly differentiated) tumor cells.
Urea nitrogen (BUN,blood urea nitrogen)
A chemical in the blood produced by the breakdown of protein. Urea nitrogen is removed from the blood by the kidneys. Blood urea nitrogen (BUN) tests are done to see how well the kidneys are working.
Urine 5-HIAA
See 5-hydroxyindoleacetic acid (5-HIAA)
Urticaria (hives)
Is a eruption of a red, raised, itchy skin rash as a result of the body's adverse reaction to certain allergens. They can appear anywhere on the body including the face, lips, tongue, throat, or ears. Hives vary in size and can last for minutes or days.