Ultrasound Examination-The use of high frequency sound waves to locate a tumor deep inside the body. Also called ultrasonography.

Unproven Methods of Cancer Management--Scientifically untested methods of preventing, diagnosing or treating cancer. The American Cancer Society maintains an extensive reference file on unproven methods of cancer management; information is available on request.

Uterus--A female reproductive organ; the womb in which an unborn child develops until birth.