Posts Tagged ‘Prostate Gland’

Prostate-Specific Antigen (PSA) Test

Prostate-specific antigen (PSA) is a protein produced by cells of the prostate gland. The PSA test measures the level of PSA in the blood. The doctor takes a blood sample, and the amount of PSA is measured in a laboratory.
Doctors often use the PSA test as prostate cancer screening tests; together, these tests can help doctors detect prostate cancer in men who have no symptoms of the disease.

Doctors’ recommendations for screening vary. Some encourage yearly screening for men over age 50, and some advise men who are at a higher risk for prostate cancer to begin screening at age 40 or 45. Others caution against routine screening. Although specific recommendations regarding PSA screening vary, there is general agreement that men should be informed about the potential risks and benefits of PSA screening before being tested.

Thus, there is no specific normal or abnormal PSA level. In addition, various factors, such as inflammation (e.g., prostatitis), can cause a man’s PSA level to fluctuate. It is also common for PSA values to vary somewhat from laboratory to laboratory. Consequently, one abnormal PSA test result does not necessarily indicate the need for a prostate biopsy.
A man should discuss an elevated PSA test result with his doctor. There can be different reasons for an elevated PSA level, including prostate cancer, benign prostate enlargement, inflammation, infection, age, and race. If no symptoms to suggest cancer are present, the doctor may recommend repeating DRE and PSA tests regularly to watch for any changes. If a man’s PSA level has been increasing or if a suspicious lump is detected during a DRE, the doctor may recommend other tests like urine test, imaging tests, CT Scan, MRI, ultrasound to determine if there is cancer or another problem in the prostate. If cancer is suspected, a biopsy is needed to determine whether cancer is present in the prostate.

Limitations of the PSA test

- Detecting tumors does not always mean saving lives : When used in screening, the PSA test can detect small tumors.
- False-positive tests : False-positive test results (also called false positives) occur when the PSA level is elevated but no cancer is actually present.
- False-negative tests : False-negative test results occur when the PSA level is in the normal range even though prostate cancer is actually present.

Need To Know

An elevated PSA does not automatically mean a man has prostate cancer. Conditions other than cancer, including an infection or a benign enlargement of the prostate, can result in higher-than-normal PSA levels.The PSA test is not foolproof.

Nice To Know

Recent studies have shown that a variation of the PSA test, called the percent-free PSA test, may be better at detecting prostate cancer.

The percent-free PSA looks at how much PSA circulates alone (free) in the blood and how much is clinging to other proteins. A low percentage of free PSA, even if the total PSA is not especially high, may mean that prostate cancer is more likely.
The percent-free PSA test is not available at all testing facilities.

| More

If you found this post informative, why not sign up to receive new posts ?
It's simple, and free, and you can even opt to receive by email:
Subscribe in a reader
Subscribe to Good Health Tips by Email

Different stages of Prostate Cancer

After prostate cancer has been diagnosed, tests are done to find out if cancer cells have spread within the prostate or to other parts of the body. Prostate cancer grows locally within the prostate, often for many years. Eventually, prostate cancer extends outside the prostate. Prostate cancer can spread beyond the prostate in three ways:

- By growing into neighboring tissues (invasion).
- By spreading through the lymph system of lymph nodes and lymph vessels.
- By traveling to distant tissues through the blood (metastasis).

The TNM System for Prostate Cancer Stages

The prostate cancer stages are described using three different aspects of tumor growth and spread. It’s called the TNM system for tumor, nodes, and metastasis.
T : for tumor – describes the size of the main area of prostate cancer.
N : for nodes – describes whether prostate cancer has spread to any lymph nodes and to what extent.
M : for metastasis – means distant spread of prostate cancer, for example, to the bones or liver.

Prostate Cancer Stage I

In stage I, prostate cancer is found in the prostate only. Stage I prostate cancer is microscopic; it can’t be felt on a digital rectal exam (DRE), and it isn’t seen on imaging of the prostate.

Prostate Cancer Stage II

The cancer is more advanced than in stage I, but has not spread outside the prostate. The Gleason score can range from 2-10. Stage II prostate cancer may also be called stage A2, stage B1, or stage B2 prostate cancer.

Prostate Cancer Stage III

Stage III prostate cancer has spread outside the prostate, but only barely. Prostate cancer in stage III may involve nearby tissues, like the seminal vesicles.

Prostate Cancer Stage IV

cancer has metastasized (spread) to lymph nodes near or far from the prostate or to other parts of the body, such as the bladder, rectum, bones, liver, or lungs. Metastatic prostate cancer often spreads to the bones. The Gleason score can range from 2-10. Stage IV prostate cancer may also be called stage D1 or stage D2 prostate cancer.

Diagnosis Tests of Prostate Cancer

Prostate cancer is diagnosed from the results of a biopsy of the prostate gland. If the digital rectal exam of the prostate or the PSA blood test is abnormal, a prostate cancer is suspected. A biopsy of the prostate is usually then recommended.

Prostate-specific antigen (PSA) test

A test that measures the level of PSA in the blood. PSA is a substance made by the prostate that may be found in an increased amount in the blood of men who have prostate cancer. PSA levels may also be high in men who have an infection or inflammation of the prostate or BPH.

Digital Rectal Exam (DRE)

During this exam, the physician inserts a lubricated, gloved finger (digit) into the rectum. Because of the prostate’s location just in front of the rectum, the physician is able to feel the edge of the prostate where the majority of cancers begin. Abnormalities such as bumps or hardness of the prostate can be detected in this way.

MRI Scan

A magnetic resonance imaging (MRI) scan is a computerized picture made by magnetic fields that can show detailed, cross-sectional images of the inner body. MRI scans can create a clear picture of the prostate gland.

Ultrasound

The prostate can be examined through a type of ultrasound called transrectal ultrasonography. In this exam, a tube is inserted into the rectum that carries the sound waves to the nearby prostate, producing a better image.

CT Scan

A CT (computed tomography) scan is a sophisticated x-ray producedure that uses a computer and rotating x-ray beams to produce images of soft tissue, bone, and blood vessels.

Prostate Biopsy

If an abnormality is found on the DRE or the PSA test, the physician will typically order a biopsy of the prostate.
A biopsy involves taking a very small sample of tissue from the prostate. This is done using a thin needle that is placed into the prostate. A tiny amount of tissue is trapped in the needle while it is in the prostate and then the needle is pulled out. This procedure is usually done by an urologist or other surgeon. The pathologist will examine the biopsy sample to check for cancer cells and determine the Gleason score. The Gleason score ranges from 2-10 and describes how likely it is that a tumor will spread. The lower the number, the less likely the tumor is to spread.
There are 2 types of biopsy procedures used to diagnose prostate cancer:
- Transrectal biopsy : The removal of tissue from the prostate by inserting a thin needle through the rectum and into the prostate.
- Transperineal biopsy: The removal of tissue from the prostate by inserting a thin needle through the skin between the scrotum and rectum and into the prostate.