Prostate Cancer
About Prostate Cancer
Prostate cancer is as common in men as breast cancer
is in women. Prostate cancer arises in the prostate gland, a male
sex organ than produces a thick fluid that makes up most of semen.
It is located between the bladder and rectum. A normal sized prostate
is about the size of a walnut. The urethra, a tube that drains urine
from the bladder during urination, passes through the prostate.
Benign
Prostatic Hyperplasia (BPH)
Interference with urinary flow is usually
caused by a non-cancerous enlargement of the prostate called benign
prostatic hyperplasia (BPH). Symptoms associated with BPH include
frequency of urination, inability to completely empty the bladder,
a weak urinary stream and frequent urination during the night. Prostate
cancer can cause similar symptoms. Diabetes, other medical conditions
and some medications also can cause some of these symptoms.
Prostate
Cancer
The prostate, like all other organs of the body, is made up
of many types of cells. Normally, cells divide in an orderly and
controlled fashion to produce more cells only when they are needed.
This process helps to keep the body healthy. Cancer is a group of
diseases that have two things in common: Cells become abnormal and
then begin to divide and grow uncontrollably. When this happens a
malignant lump or tumor may appear. In the case of prostate cancer,
sometimes a nodule or firm area can be felt during a digital
rectal exam (DRE).
Cancer cells
may invade and damage the healthy surrounding tissue. In the case
of prostate cancer, the adjacent normal tissues include the surrounding
fat and muscle, the nerves that stimulate an erection (located in
the neuro-vascular bundle), the seminal vesicles, (sacs that sit
on top of the prostate that store the seminal fluid that is ejaculated
during sex), the bladder and the urethra. Cancer cells also can be
released into the blood stream or into lymphatic channels and spread
to other parts of the body. This process is called metastasis. When
prostate cancer metastasizes, it most commonly spreads to the pelvic
lymph nodes and the bones.
Prostate Cancer Symptoms
Most men with
prostate cancer have no obvious symptoms. When symptoms do appear,
they may be a lot like the symptoms of BPH and include:
- Trouble
passing urine
- Frequent urge to pass urine, especially
at night
- Weak or interrupted urine stream
- Pain
or burning when passing urine
- Blood in the urine or
semen
- Painful
ejaculation
- Nagging pain in the back, hips or pelvis
Since
prostate cancer can spread to the bones, bone pain, especially
in the back, can be another symptom.
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