Articles In This Section
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A to Z: Ulcerative Colitis
Learn more about this inflammatory disease of the large intestine, or colon.
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A to Z: Umbilical Granuloma
Learn about disorders related to the umbilical cord and issues that affect newborn babies.
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A to Z: Undescended Testicle
Undescended testis is a condition in which one or both of a boy's testicles (testes) have not moved into their proper place in the scrotum.
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A to Z: Upper Respiratory Infection
An upper respiratory infection (URI) can be caused by many viruses or bacteria. The common cold, croup, and sinusitis are all URIs.
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A to Z: Ureterocele
Ureteroceles are caused by a birth defect in which the opening in the ureter is too small for urine to pass freely into the bladder.
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A to Z: Ureteropelvic (UP) Junction Obstruction
Ureteropelvic junction obstruction is a partial or total blockage of the flow of urine in the area where a ureter attaches to a kidney.
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A to Z: Urinary Tract Infection (UTI)
Learn about bacterial infections and conditions that can affect the urinary tract.
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A to Z: Urticaria (Hives)
Learn about urticaria, the red raised bumps or welts on the skin that are commonly called hives.
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A to Z: Uveitis
Learn more about conditions of the eyes and factors that may contribute to vision loss.
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A to Z: Uveitis, Anterior
Learn more about conditions of the eyes and factors that may contribute to vision loss.
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A to Z: Ureitis
Learn more about conditions of the eyes and factors that may contribute to vision loss.