Skip to content
My WebMD Sign In, Sign Up
Font Size

Prostate Cancer Treatment (PDQ®): Treatment - Health Professional Information [NCI] - General Information About Prostate Cancer

continued...

Molecular markers

A number of tumor markers have been reported to be associated with the outcome of prostate cancer patients.[20,21] These include:

  • Markers of apoptosis including Bcl-2, Bax.
  • Markers of proliferation rate, such as Ki67.
  • p53 mutation or expression.
  • p27.
  • E-cadherin.
  • Microvessel density.
  • DNA ploidy.
  • p16.
  • PTEN gene hypermethylation and allelic losses.

However, none of these has been prospectively validated; and they are not a part of the routine management of patients.

Clinical Presentation

In the United States, most prostate cancers are diagnosed as a result of screening; therefore, symptoms of cancer are infrequent at the time of diagnosis.[21] Nevertheless, local growth of the tumor may produce symptoms of urinary obstruction such as:

  • Decreased urinary stream.
  • Urgency.
  • Hesitancy.
  • Nocturia.
  • Incomplete bladder emptying.

These symptoms are nonspecific and more indicative of benign prostatic hyperplasia than cancer.

Although rare in the current era of widespread screening, prostate cancer may also present with symptoms of metastases, such as bone pain, pathologic fractures, or symptoms caused by bone marrow involvement.

Diagnostic Evaluation

Needle biopsy is the most common method used to diagnose prostate cancer. Most urologists now perform a transrectal biopsy using a bioptic gun with ultrasound guidance. Over the years, there has been a trend toward taking eight to ten or more biopsy samples from several areas of the prostate with a consequent increased yield of cancer detection after an elevated PSA blood test.[21] Less frequently, a transperineal, ultrasound-guided approach can be used in patients who may be at increased risk of complications caused by using a transrectal approach.[25]

Prophylactic antibiotics, especially fluoroquinolones, are often used prior to transrectal needle biopsies. There are reports of increasing rates of sepsis, particularly with fluoroquinolone-resistant E. coli, and hospitalization after the procedure.[26,27] Therefore, men undergoing transrectal biopsy should be told to seek medical attention immediately if they experience fever after biopsy.

Prognostic Factors

The survival of patients with prostate cancer is related to several factors, including the following:[28,29,30,31,32]

  • Extent of tumor.
  • Histologic grade of tumor.
  • Patient's age and health.
  • Prostate-specific antigen (PSA) level.

(Refer to the Surveillance, Epidemiology, and End Results' 5-year and 10-year survival rates.)

Extent of tumor

When the cancer is confined to the prostate gland, long-term prognosis is excellent. Patients with locally advanced cancer are not usually curable, but 5-year survival is still very good. If prostate cancer has spread to distant organs, current therapy will not cure it. Median survival is usually 1 to 3 years, and most of these patients will die of prostate cancer. Even in this group of patients, indolent clinical courses lasting for many years may be observed.

Histologic grade of tumor

Poorly differentiated tumors are more likely to have metastasized before diagnosis and are associated with a poorer prognosis. The most commonly used method to report tumor differentiation is the Gleason score. (Refer to the Pathology section of the General Information About Prostate Cancer section of this summary for more information.)

1|2|3|4|5|6

WebMD Public Information from the National Cancer Institute

Last Updated: February 25, 2014
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.
Next Article:

Today on WebMD

Prostate Cancer Overview
SLIDESHOW
what is your cancer risk
HEALTH CHECK
 
woman speaking with doctor
VIDEO
Prostate Nerve Transplant
VIDEO
 
cancer fighting foods
SLIDESHOW
15 Cancer Symptoms Men Ignore
FEATURE
 
Prostate Enlarged
VIDEO
Picture Of The Prostate
ANATOMY
 
Prostate Cancer Quiz
QUIZ
screening tests for men
SLIDESHOW
 
Prostate Cancer Symptoms
VIDEO
Vitamin D
SLIDESHOW