NCCN Guidelines for Patients
Prostate Cancer, Version 1.2016
The prostate is a gland that makes a white-colored
fluid. Sperm mixes with this fluid and other fluids
to form semen. Semen is ejected from the body
through the penis during ejaculation. The fluid from
the prostate protects sperm from the acid inside a
As shown in
, the prostate is located below
the bladder near the base of the penis. Urine from
the bladder travels through the urethra, which passes
through the prostate and into the penis. Above the
prostate and behind the bladder are two seminal
vesicles. Seminal vesicles are also glands that make
a fluid that is part of semen.
Inside the prostate, 30 to 50 small sacs make and
hold the white-colored fluid. The fluid travels in ducts
to the urethra during ejaculation. Around the sacs and
ducts is connective tissue.
The prostate begins to form while a baby is inside
his mother’s womb. After birth, the prostate keeps
growing and reaches nearly full size during puberty.
At this point, it is about the size of a walnut.
Testosterone causes the prostate to grow slowly in
most men. However, the prostate may grow to a large
size in some men and cause problems passing urine.
Prostate cancer basics
The prostate gland makes a fluid
that is part of semen.
The prostate gland
makes a fluid that is
part of semen.
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