Ulcerative Colitis see Crohn's disease and Ulcerative Colitis
Ullrich Congenital Muscular Dystrophy see Congenital Muscular Dystrophy
Ulna Hemimelia see Hemimelia
UMP Hydrolase deficiency see Purine & Pyrimidine Metabolic diseases
Undiagnosed Children
Unilateral Multilobar Polymicrogyria see Congenital Bilateral Perisylvian syndrome
Unilateral Perisylvian Polymicrogyria see Congenital Bilateral Perisylvian syndrome
Upper Limb Abnormalities
Urea Cycle Disorders
Usher syndrome
Uveitis