Role of Seminal Vesicles in Prostate Cancer

What Is the Role of Seminal Vesicles in Prostate Cancer?

Involvement of the seminal vesicle in prostate cancer means the cancer has spread into the seminal vesicles. This can affect male fertility because it may block or damage the tubes that carry semen. In cancer staging (TNM system), this is called stage T3b prostate cancer. This happens when tumor cells enter the seminal vesicles. This condition significantly impacts male reproductive health and can be linked to male infertility due to the disruption of the ejaculatory duct function.

What Are Seminal Vesicles?

Seminal vesicles are two small, tube-like glands in men. They make a fluid that mixes with semen. They sit above the prostate, behind the bladder, and in front of the rectum. One gland is located on the left, and the other is located on the right. Each gland is about two inches long. They help with fertility because they take part in carrying semen out of the body during ejaculation.

What Is Seminal Vesicle Cancer?

Seminal vesicle cancer is very rare. It starts in the seminal vesicles. Most of the time, these glands get cancer only when another cancer, like prostate or bladder cancer, spreads to them.

Detecting cancer early helps improve treatment outcomes.

1. How often does it happen?

Prostate cancer is the most common cancer that spreads to the seminal vesicles. Sometimes, rectal or bladder cancer can also spread here, but this is rare. About 10% of prostate cancer cases affect the seminal vesicles. When cancer spreads to these glands, it indicates that the disease has progressed to a more advanced stage.

2. Symptoms of seminal vesicle invasion in prostate cancer

Symptoms may include:

• Blood in semen.

• Pain in the lower belly or pelvis.

• Trouble urinating.

Doctors may suspect seminal vesicle invasion (SVI) if a patient has:

• High PSA levels.

• Prostate cancer is found near the base of the prostate.

• A high Gleason score (meaning fast-growing cancer).

• SVI usually means the cancer is more serious and may return after treatment.

How Does Cancer Spread to the Seminal Vesicles?

Cancer can reach the seminal vesicles when cancer cells break away from a nearby organ, like the prostate, and start growing into nearby structures. These cells travel through small ducts or tissues and form new tumor spots. This usually happens when the cancer becomes more advanced and starts spreading beyond its original place.

Cancer can spread to the seminal vesicles in different ways, like:

• Through the ejaculatory duct.

• From the base of the prostate or nearby tissues.

• As separate small tumor spots.

What Do Scans Show?

Imaging helps doctors see if cancer has spread to the seminal vesicles or not. It also enables them to know the extent of the invasion.

Scans may show:

• Bigger or swollen seminal vesicles.

• Irregular shapes.

• Tumor growth into nearby areas.

• Loss of the normal angle between the prostate and seminal vesicles.

How Do Doctors Diagnose Seminal Vesicle Involvement?

Doctors use several tests:

• Ultrasound - May show a mass near the seminal vesicles.

• MRI - The best test to detect invasion clearly.

• CT scan - Shows changes in the glands.

• Biopsy - Confirms if the invaded cells are cancerous.

• PSA test - High PSA can point to prostate cancer that might be spreading.

How Is It Treated?

Treatment is decided by the extent of cancer spread. Options include:

1. Radiation therapy:

• Hypofractionated IMRT: Uses higher doses in fewer sessions with very precise targeting. It helps kill cancer cells while protecting healthy tissues.

• Conventional radiotherapy: Uses smaller doses over more sessions. It slowly shrinks or destroys cancer cells over time.

2. Hormone therapy (ADT)

• This treatment lowers male hormones like testosterone.

• Cancer cells need these hormones to grow, so lowering them helps slow or stop the cancer.

3. Surgery

• Radical prostatectomy with seminal vesicle removal: The surgeon removes the prostate gland and the seminal vesicles.

• This is done when the cancer is still inside or close to the prostate.

4. Chemotherapy

• Used when cancer has spread to other parts of the body.

• It kills fast-growing cancer cells and helps control symptoms.

5. Targeted therapy

• Targets specific changes or weaknesses in cancer cells.

• Helps block cancer growth with fewer side effects than standard chemo.

6. Radical prostatectomy for prostate cancer

• The whole prostate gland is removed through surgery.

• It is usually recommended for early-stage or locally advanced prostate cancer.

Conclusion:

Seminal vesicles play an important role in male reproductive health. Prostate cancer is the most common cause of seminal vesicle invasion. When these glands are affected, fertility and ejaculation can be harmed. Early diagnosis with scans like MRI and CT helps doctors treat the condition effectively. Healthy habits can reduce the risk of cancers that affect male reproductive organs.

Key Takeaways:

• Seminal vesicles are glands that help make semen.

• Prostate cancer can spread to these glands when it becomes more serious.

• MRI scans help doctors see if the cancer has reached these glands.

• Treatments include radiation, surgery, medicines, or hormone therapy.

• To understand it better, talk to our doctor.