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Anatomy
Prostate Cancer
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What is prostate cancer?
-
The prostate is a gland in
the male genitourinary tract. The gland surrounds the
urethra, the tube that leads from the bladder to the outside.
The prostate gland makes up fluid that becomes part of semen,
the white fluid that a male produces on ejaculation.
Semen carries sperm to the outside. Cancer of the prostate
occurs when a part of this gland doesn't stop growing, and the
cells grow into a tumor. Imagine a walnut with a
small pea size/shaped area that becomes hardened and keeps
getting bigger. Eventually, that pea sized tumor grows
- As this area grows larger, chances are it
will grow across a blood vessel. When this occurs, the
tumor not only gets more blood supply to grow bigger, but it
also enables small tiny parts of the tumor to get into the
blood stream and spread to other areas in the body. When
this happens, the the small tumor pieces can then continue
growing where ever they land. Often they get stuck
in small blood vessel channels in the bones. Here they grow
into additional tumors. When a tumor doesn't stop
growing it is called malignant. When a tumor spreads to
other areas it is called metastatic spread.
- How is this different from Benign Prostatic
Hypertrophy (BPH)? BPH is a condition where the entire
gland becomes enlarged, and harder. When this occurs,
the urethral tube that takes urine from the bladder to the
outside becomes crowded. When this tube becomes crowded,
it gets narrower, and urinating becomes difficult.
Imagine that your hand is holding a hose. Imagine that
you hand is the prostate gland, and the hose is your urethra.
If you squeeze the hose while water is trying to pass then it
changes the stream of water coming out. This is the same
effect an enlarged prostate has on a man trying to pass urine
through the urethra tube.
- How is cancer in the prostate found?
Several methods are used to find prostate cancer. It is
important to understand the limitations of each.
On physical examination the doctor places a gloved finder into
the rectum. This is called a digital rectal exam (DRE).
It is important to realize that this exam only enables the
doctor to touch the back part of the prostate gland. The
front part of the prostate is not in an area that can be
touched. Therefore, if you are told by your doctor that
the prostate feels normal, this is only means that the back
surface feels normal. Cancer can grow anywhere, in the
front and/or the inside, where the doctor cannot feel the
tumor. The other thing to remember is that if a tumor
can be felt, that means it has been present for some time.
This means that it might have already grown into the area of
blood vessels. This means that doctors need another way
to check for cancer. Recent advances in medicine, have
made this possible. A blood test called a PSA can be
helpful in finding cancer in the prostate.
If I had suspected Prostate Cancer this is where
I would go
MRIProstateCancerCenter.com
- What is PSA?
Prostate
Specific Antigen (PSA) is a blood test that looks for a
protein made by the cells in the prostate gland. If
there are high levels of PSA, this means cancer might be the
cause. Small amounts of PSA are considered normal.
The problem with a PSA test is that sometimes it has a level
in the middle. This may mean cancer, or it may not.
If it is an early cancer tumor that can't be felt, then
it is very important to find out before it gets any bigger, or
spreads.
- What happens when a PSA test is in the
middle? Doctors now can then do a biopsy of the prostate
gland. A biopsy is when a doctor takes a small sample of
cells from the area of concern. The word biopsy means to
cut, or gather, a small sample. In the case of the
prostate gland this is done with a biopsy needle.
WHAT!!! Your asking yourself how does a needle get into
that gland that can't be seen, and can only be partially felt
by your doctor? You guessed it, very carefully!!!
Your doctor uses a ultrasound device near your rectum, points
it towards the prostate, and looks for areas that appear
harder than others. Then your doctor will take a biopsy
needle and push it towards the prostate through the skin that
is between the base of you penis and your rectum.
Your doctor then uses the ultra sound to guide it towards the
possible tumor. Once the needle reaches the
possible tumor, a syringe is attached to the needle and used
to pull out a small sample of cells. This is called
needle aspiration. Once the sample has been taken, it is sent
to the laboratory to be looked at under a microscope by
another doctor called a pathologist. If cancer
cells are found then your doctor has to perform additional
tests to find out what stage your cancer is. What stage
it is will determine what kind of treatment is performed.
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