In anatomy, the urethra is a tube which connects the urinary bladder to the outside of the body. The urethra has an excretory function in both sexes to pass urine to the outside, and also a reproductive function in the male, as a passage for sperm.
The external urethral sphincter is a smooth muscle that allows voluntary control over urination.

eMedicine: Urethral Cancer - Article by Jack H Mydlo, MD about this rare cancer. Includes an introduction, workup, tests, staging, treatment, pictures, and prognosis.
Meta Description: [ Urethral Cancer - Urethral cancer is an extremely rare lesion, with only approximately 600 reported cases. Urethral cancer comprises less than 1% of the total incidence of malignancies. Because many medical centers see only a few cases over many years, not enough data are available from large ser... ]
NCI: Urethral Cancer - Provides information urethral cancer, includes description, stages, treatment option, and recurrences.
Meta Description: [ Expert-reviewed information summary about the treatment of urethral cancer. ]
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