Seminal Vesicle

What the Seminal Vesicles Are and What They Do

The seminal vesicles are a pair of small, tube-like glands located behind the bladder and near the prostate gland in males. They are part of the male reproductive system and produce a fluid that makes up most of the volume of semen. This fluid contains substances that help nourish sperm and support their movement, which is important for fertility. The seminal vesicles develop before birth under the influence of male hormones, especially testosterone, and contain enzymes that convert testosterone into a more active form called dihydrotestosterone (DHT).

Why Seminal Vesicles Matter in Cancer Care

In prostate cancer, the cancer can sometimes spread beyond the prostate gland to nearby tissues, including the seminal vesicles. When cancer involves the seminal vesicles, it can affect the stage of the disease and influence treatment choices. For example, in stage IVA prostate cancer, cancer may be found in one or both sides of the prostate and may have spread to the seminal vesicles or nearby organs like the bladder or rectum. Because of this, doctors carefully examine the seminal vesicles during diagnosis and surgery.

Symptoms and Conditions Affecting the Seminal Vesicles

Diseases of the seminal vesicles may cause vague or no symptoms, making them hard to detect. Infections of the seminal vesicles, called seminal vesiculitis, often result from bacterial infections, including sexually transmitted infections or after surgery. Symptoms can include pain in the lower abdomen, scrotum, or penis, painful ejaculation, or blood in the semen. Other conditions such as cysts or stones can also affect the seminal vesicles, sometimes requiring treatment if they cause blockage or infection.

How Seminal Vesicles Appear in Medical Care and Reports

The seminal vesicles may be mentioned in medical reports, especially in the context of prostate cancer diagnosis, staging, or surgery. For example, during a radical prostatectomy (surgical removal of the prostate), the seminal vesicles are often removed as well. Biopsies may sometimes include seminal vesicle tissue to check for cancer spread. If the term appears in your medical records or discussions, it’s important to ask your care team what it means for your specific situation.

What the Term Does Not Automatically Mean

Seeing the term seminal vesicle in your medical information does not automatically mean you have cancer in these glands or that you will have symptoms. Many conditions affecting the seminal vesicles are rare or may not cause noticeable problems. Also, involvement of the seminal vesicles by cancer is only one part of the overall diagnosis and treatment plan.

Questions to Ask Your Care Team

If you hear about seminal vesicles in your care, you might ask: Is the seminal vesicle involved in my condition? How does this affect my diagnosis or treatment? Will the seminal vesicles be removed or biopsied? What symptoms should I watch for related to these glands? Understanding these points can help you feel more informed and involved in your care.

Using This Information Safely

This information is meant to help you understand what seminal vesicles are and why they may be important in cancer care. It does not replace personalized advice from your healthcare team. Always discuss your specific diagnosis, test results, and treatment options with your doctors to understand what applies to you.

Next Steps for Patients and Caregivers

If you see the term seminal vesicle in your medical records or hear it during appointments, the best next step is to ask your care team what it means for your situation. They can explain how it relates to your diagnosis, treatment plan, or symptoms. Being informed helps you participate actively in your care and make decisions that are right for you.