An opening made surgically to allow the colon to exit the body through the perineum (the area of the body between the anus and the vulva in females, and between the anus and the scrotum in males). A colostomy provides a new path for waste material to leave the body after part of the colon has been removed.
( PAYR-ih-NEE-ul koh-LOS-toh-mee )
Source: NCI Dictionary of Cancer Terms
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