Prostatic intraepithelial neoplasia (PIN) is the name given to
certain changes in the cells that line the prostate gland. These
changes can only be seen under a microscope. The cells may be a
particular size or shape or grow in a different way to normal
prostate cells. We do not know what causes PIN, but we do know that
the chance of finding it increases as you get older.
PIN is not the same as prostate cancer.
PIN does not cause any symptoms on its own. However, you may
have problems with passing urine at the same time as being
diagnosed with PIN. This is because PIN is usually found when you
are having tests or treatment for another prostate
problem, which may be causing problems passing urine.
Updated May 2011
To be reviewed May 2013