Ulcerative colitis
Umbilical cord management
Underactive bladder
Unruptured intracranial aneurysm
Upper gastrointestinal endoscopy
Upper urinary tract urothelial carcinoma
Urachal remnant
Urea cycle disorders
Ureteral injury
Urethral cancer
Urethral diverticulum
Urethral injury
Urethral stricture
Urinary fistula
Urinary incontinence in men
Urinary incontinence in women
Uterine fibroids
Uterine sarcoma
Uterine septum
Uveal melanoma