Definition

A type of cancer that usually begins in the glandular (secretory) tissue that lines the prostate and spreads to the ducts within the prostate. Intraductal prostate carcinoma tends to be large when it is found and tends to grow and spread quickly to other parts of the body. It usually has a poor prognosis (chance of recovery) and is likely to come back after treatment. Also called IDC-P and intraductal carcinoma of the prostate.