NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,777 terms related to cancer and medicine.

Browse the dictionary by selecting a letter of the alphabet or by entering a cancer-related word or phrase in the search box.

perineum
(PAYR-ih-NEE-um)
The area of the body between the anus and the vulva in females, and between the anus and the scrotum in males.

EnlargeDrawing of the vulva shows the mons pubis, clitoris, urethral opening, inner and outer lips of the vagina, and the vaginal opening. Also shown are the perineum and anus.

The perineum is part of the vulva and is the area between the anus and the vaginal opening in females. In males, it is the area between the scrotum and the anus.