Category: U

  • Ulnar drift

    Alteration in the position of the metacarpophalangeal joints where the fingers curve toward the ulnar bone of the forearm; results from rheumatoid arthritis. A joint abnormality at the metacarpophalangeal joints, frequently seen in rheumatoid arthritis, resulting from chronic synovitis. In this condition, the long axis of the fingers deviates in an ulnar direction with respect…

  • Ulcerative keratitis

    Erosion of the cornea.  

  • Uropathy

    Any disease of the urinary tract.  

  • Urinary urgency

    Sudden, compelling urge to urinate, accompanied by discomfort in the bladder. Sometimes called hyperactive bladder. If ignored, may produce urinary incontinence. Treatment depends upon the cause. The inability to postpone urination once the need to void has been felt.  

  • Urinary hesitancy

    Difficulty in beginning the flow of urine and decrease in the force of the urine stream. In men it is associated with prostate gland enlargement; in women with narrowing of the opening of the urethra or obstruction between the bladder and urethra; it may also be caused in either sex by emotional stress and other…

  • Urinary frequency

    Greater than normal frequency of the urge to void without an increase in the total daily volume of urine; it is associated with inflammation of the bladder or urethra or dysfunction in the bladder, and is often accompanied by burning and discomfort. Treatment depends on the cause. An abnormal increase in the number of times…

  • Urinary calculus

    Stone formed in any part of the urinary system (kidney, ureter, bladder); some are small enough to pass in the urine, with or without pain; others must be removed surgically; also called kidney stone; renal calculus. A stone formed in the urinary tract, but usually found in the renal pelvis and/or kidney calyces. These vary…

  • Uricaciduria

    Greater than normal levels of uric acid in the urine, associated with gout or urinary system malfunction. An unusually high concentration of uric acid present in the urine.  

  • Ureterostenosis

    Abnormal narrowing of the ureter. Narrowing of a ureter, also known as ureterostenosis or ureterostenoma.  

  • Uratemia

    Presence of uric acid salts in the blood, occurring in gout. The presence in the blood of sodium urate and other urates, formed by the reaction of uric acid with bases. In gout, uratemia leads to deposition of urates in various parts of the body.