Education
For patients and/or
spouses and their family members please visit the following support
website
Patient Guide
to Prostate Cancer
Prostate Cancer is the most common cancer
in American men today. 1 out of 10 men will develop prostate
cancer at some stage in their lives. Prostate Cancer is the second
leading cause of cancer deaths among men in the U.S., however, it can be
treated successfully if detected early on.
The prostate is a gland in the male
reproductive system and is the size of a small walnut. The
prostate organ is located between the urethra (carries urine outside of
body) and the bladder (stores urine). The main function of a
prostate is to produce the fluid for semen which transports sperm.
The prostate itself consists of muscular and glandular tissues.
What is Prostate Cancer?
Prostate Cancer is the malignant tumor
that begins to grow within the outer layers outside of the prostate. As the
tumor grows, it then can spread into the inner part of the prostate.
Localized prostate cancer is cancer that is confined within the prostate
and has not spread. Prostate cancer can spread (metastasize) first
locally in the tissue, then the seminal vesicles (sac-attached to
prostate) and in advanced cancer can spread to lymph nodes or bones.
Prostate Cancer is staged according to
the extent of cancer spread:
| Prostate Cancer Stages:
|
Meaning: |
| T1 and T2 |
Cancer confined to prostate gland |
T3 and T4
into surrounding tissue |
Cancer
grown beyond the prostate |
| N+ |
Spread to lymph nodes |
M+
i.e. bones |
Metastases to other "distant" areas |
Each man diagnosed with prostate cancer
is confronted with a decision of which treatment option to have. Judgments
are based on the individual patient, his overall health and grade of the
disease.
How Prostate Cancer is Treated?
Watchful waiting has
been advocated as a reasonable approach for some men as prostate cancer,
left untreated, grows quite slowly. Again, judgments need to be based on
the expected life span of the individual patient, his overall health,
and the grade of the disease. But in especially elderly men, watchful
waiting is reasonable when the prostate cancer is low grade. Watchful
waiting is NOT an alternative for everyone. Please consult your
physician for more information on watchful waiting.
Radical Prostatectomy
is the surgery performed for the treatment of localized
prostate cancer. Radical Prostatectomy has been considered
to be the GOLD
standard for treatment of prostate cancer . The surgeon makes
an incision in the lower abdomen, (retropubic) or depending
on the surgeon, behind the scrotum, (perineal). The entire
prostate and the seminal vesicles are then removed.
This surgery is recommended by surgeons when the cancer is confined
within the tissues removed during radical surgery. Radical
Prostatectomy can cure localized cancer but a strong post-operative
follow up on PSA levels should be conducted to detect if small
amounts of cancer were left behind. Larger tumors
do not respond as well to surgery since they may extend outside
the margin of the tissue removed at surgery.
Risks and Side Effects of Radical
Prostatectomy: Incontinence and Impotence
Incontinence: Sometimes
patients experience some degree of incontinence (urine leakage) for up
to 2/3 months following the radical surgery. A majority of men
eventually regain good control of urinary functions after surgery.
Impotence: Impotence can be a
potential side effect of the Radical Prostatectomy. A surgery
technique called nerve-sparing surgery was pioneered by Dr. Pat Walsh of
John Hopkins University in which the nerves are spared during surgery.
The latest technology to assist surgeons in mapping the location
of these vital nerves is the CaverMap Surgical
Aid. The nerves bundles responsible for
erectile function lie close to the prostate and the location of the
nerves can vary given the anatomical differences between patients.
CaverMap allows the surgeon to place a sensored probe tip in the
body cavity during prostate removal. The surgeon is then alerted
with a series of both audio and visual beeps when he has located a nerve
responsible for erections. A tumescence sensor is also placed on
the penis to monitor blood flow (penis becomes engorged) and this too
signals the surgeon he is on a vital nerve. This helps the surgeon
map out and cut around the nerve, sparing it of damage, and helping to
preserve erections in the patient post-operatively. 100 of the top
institutions nationwide use the CaverMap Surgical Aid to assist them in
their nerve sparing techniques. To obtain a list of institutions
in your area please see CaverMap Surgical Aid
Sites 2000. Successful treatment of erectile function in a patient after
prostatectomy with Sildenafil citrate Viagra® may
depend on preservation of nerve bundles.1 See www.viagra.com.
Please consult your physician for more information on radical
prostatectomy and CaverMap.
Brachytherapy
The term "brachy" comes
from the Greek word for
short distance. Brachytherapy is a cancer-killing treatment using
radiation at a very short distance from the tumor. Radioactive seeds
or sources are placed in the tumor itself, or in the surrounding tissue
to provide a lethal dose of
radiation. Brachytherapy is the most exact method for giving radiation
therapy. It can be used to treat many types of cancers, including
prostate. There are different types of radiation seeds used, two
types are iodine-125 and
palladium-103.
Prostate cancer is well suited to
brachytherapy. The prostate gland is tucked under the bladder and in
front of the rectum, and it is extremely important that the radiation be
focused on the prostate gland to avoid serious side effects.
There are two major methods of prostate brachytherapy, permanent seed
implantation and high dose rate (HDR) temporary brachytherapy, also
known as a temporary seed implant. Permanent seed implants
involve the placement of approximately 100 radioactive seeds into the
prostate gland. The radiation is given off at a low dose rate over
several months, and then the seeds remain in the prostate gland
permanently.
High Dose Radiation temporary
brachytherapy involves the placement of small plastic
catheters which are inserted into the prostate gland. A computer-controlled machine
pushes a single highly radioactive seed into the catheters one
by one usually, several such treatments are given over a period of hours
or days. Computers control how long a single seed can remain in each of
the catheters, therefore radiation dose is easily controlled in
different regions of the prostate. Please consult your physician for more information about Brachytherapy.
Hormone Therapy
Hormone therapy for prostate cancer is
based on the fact that many prostate cancers will only grow in the
presence of male hormone (testosterone). In such cases, the cancer
may be shrunk for long periods of time (and will stop growing) if the
patient's testosterone level is suppressed. This is considered hormonal
treatment.
Years ago it was found that patients who
had metastatic prostate cancer to the bones would often go into
remission if only their testicles were removed. Testicles are the
major source of male hormone in the body, so removing them is an
effective method of lowering the testosterone level. The reason it
is less common is the many psychological reasons that deter men from
considering such an approach.
In response to that, various medical
approaches have been developed to deprive production of testosterone in
the body. The earliest method involved giving estrogen (female
hormones) which would suppress male hormone production by a feedback
mechanism from the pituitary gland (gland in the base of the brain)
which controls the testicles testosterone production. The method
is simple and inexpensive, but has reported several side effects.
More recently injectable medications have been shown to be just as effective as orchiectomy in
dropping hormone levels down and controlling the cancers.
Other medications such as Casodex are sometimes added for an additional
boost to the hormone control mechanism.
Hormone therapies are usually reserved
for patients who have evidence of spread of their cancers to other parts
of the body, or who have had failure of another treatment for their
cancer. Hormonal therapy is also sometimes used to temporarily
shrink the cancer to facilitate another treatment approach such as i.e.
brachytherapy.
Please consult your physician for more
information about Hormone therapy.
External Beam Radiation
External beam radiation involves the use
of x-rays or gamma rays to eradicate malignant cells. This treatment has
been around for almost 100years. The X-rays penetrate the
body tissue and deliver radiation to the cancer cells, usually seated
deep inside the body. Use of X-rays do have side effects, because
normal tissues and organs also are affected by these penetrating
radiations. To reach the cancer cells, often, the x-rays have to
penetrate through normal surrounding tissues. Conformal radiation
therapy, or otherwise called three-dimensional conformal radiation
therapy (3D CRT) is now the standard of care and approaches the cancer
from several angles to minimize exposure and thereby damage to adjacent
normal tissues.*
Radiotherapy in recent years has been in the use of proton beams instead
of x-rays. Protons have an advantage over x-ray therapy in that each
individual beam conforms to the target volume in all three dimensions.
Protons can be shaped to deliver more precise doses of radiation within
millimeters of the target, helping to spare normal tissues of excess
damage.
Please consult your physician for more information regarding External
Beam Radiation.
Cyrosurgery
"Cryoablation"
is the controlled freezing of the prostate gland in order to destroy the
cancerous cells. Cryosurgery of the prostate is for treating
prostate cancer without the trauma of surgery. Minimal blood loss,
little discomfort, and a single day in the hospital are the benefits of
this approach. However cryosurgery is still a treatment method
that is undergoing testing to improve results.
The treatment involves the placement of
five needles into the prostate through the perineal skin. The
patient is under anesthetic. Needles are placed with guidance
transrectally. Through a series of needles, and plastic straws
liquid nitrogen is then pumped into each of the cryoprobes. The
end of each cryoprobe gets extremely cold and the entire prostate is
frozen. Please consult your doctor for more information
regarding cryosurgery.
- See our links
page for more related prostate cancer links
References
1
Treatment of Erectile Function After Radical Prostatectomy
Prostatectomy may depend on preservation of bilateral neurovascular
bundles: Craig D. Zippe, MD, Anurag W. Kedia, MD,
Kalish Kedia, MD,
David R. Nelson, MD, Ashok Agarwal MD
Prostate Health Council c/o
American Foundation for Urologic Disease afud.com
Cancer Treatment Centers of America,
Reference data from Brachytherapy.com
Call 1-800-788-8485 ext 5170 for more information
Article by Duke K. Bahn, MD. Part of the
Cancer News on the Net.
Health > Medicine > Surgery >
University of Massachusetts Medical
Center.
Health > Medicine > Surgery >
*Exerpts from http://www.rado.uic.edu/vijay/#conformal
**From Loma Linda Hospital site at http://www.llu.edu/proton/patient/news/prost1.html
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