Prostate-Specific Antigen (PSA) is a protein produced by the cells of the prostate gland. Found in small amounts in the bloodstream of men with healthy prostates, its primary role is to help liquefy semen. However, when PSA levels rise above the normal range, they often raise concerns, particularly around prostate cancer. It’s important to note, though, that while high PSA can be a marker of cancer, it is not exclusive to malignancy.
According to the Nigerian Cancer Society, prostate cancer is one of the most commonly diagnosed cancers among Nigerian men, with over 100,000 new cases annually. Yet elevated PSA can be caused by several other conditions, such as Benign Prostatic Hyperplasia (BPH), urinary tract infections (UTIs), prostatitis, recent ejaculation, or certain medical procedures. Misinterpretation of PSA results without proper context can lead to undue anxiety or even unnecessary procedures.
What is PSA and Why Is It Important?
PSA is a protein secreted by both normal and abnormal prostate tissue. It circulates in the blood and is measured through a simple blood test. While PSA testing is a valuable screening tool for prostate-related conditions, its use as a diagnostic marker is nuanced.
Increased PSA levels may suggest prostate inflammation, infection, benign enlargement, or malignancy, but on their own, they cannot confirm or exclude prostate cancer. Therefore, healthcare professionals rely on a more holistic diagnostic approach: evaluating PSA alongside factors such as age, race, digital rectal examination (DRE) findings, family history, medical history, and clinical symptoms.
Why Might Your PSA Be Elevated?
Let’s explore the most common reasons for elevated PSA levels:
1. Age
PSA levels naturally rise as men grow older. This increase is typically associated with the gradual enlargement of the prostate, a benign process known as Benign Prostatic Hyperplasia (BPH). The age-related rise in PSA does not necessarily indicate disease but underscores the importance of age-adjusted PSA reference ranges during interpretation.
In men over 50, slightly elevated PSA is often a reflection of prostate tissue overgrowth rather than malignancy. However, any PSA change should be evaluated in context. For instance, a sharp increase over a short time span may warrant further investigation, even if the absolute value falls within the “normal” range for age.
2. Benign Prostatic Hyperplasia (BPH)
BPH is a common, non-cancerous enlargement of the prostate gland that affects a significant proportion of men over the age of 50. As the prostate enlarges, it can compress the urethra, causing urinary difficulties and raising PSA levels due to increased glandular activity and irritation. If left untreated, BPH can potentially interfere with kidney function.
Common symptoms include:
- Difficulty starting urination – This refers to experiencing a delay or trouble when attempting to initiate urination. This can be caused by prostate enlargement, infection, or nerve problems and may result in discomfort or a feeling of incomplete bladder emptying.
- Weak or interrupted urine flow – Refers to a urinary stream that is slower than normal, difficult to start, or stops and starts multiple times. This symptom may suggest prostate enlargement, urinary tract obstruction, or bladder dysfunction and should not be ignored.
- Frequent urination, especially at night – This refers to the need to urinate more often than usual, particularly during the night, a condition medically termed nocturia. In the context of prostate-specific antigen (PSA) and prostate health, this symptom may indicate that the prostate is enlarged or inflamed, possibly pressing against the urethra and bladder. This pressure can reduce the bladder’s capacity or disrupt its normal signalling, leading to the urge to urinate more frequently and interrupting sleep. It’s a common early symptom in Benign Prostatic Hyperplasia (BPH) or even prostate cancer, hence why it’s monitored in PSA-related evaluations.
- Urgency to urinate – This is a sudden and intense need to urinate that is difficult to postpone. It is often caused by pressure on the bladder or urethra due to an enlarged prostate. In Benign Prostatic Hyperplasia (BPH), the prostate may grow large enough to constrict the urethra, leading to this sense of urgency even when the bladder is not full. This symptom can interfere with daily activities and cause anxiety, especially if access to a restroom is limited. It is often accompanied by other symptoms like frequent urination or nocturia, and may also be seen in urinary tract infections and prostatitis.
- Incomplete bladder emptying – A feeling that the bladder hasn’t been completely emptied after urinating.
BPH is not life-threatening, but left untreated, it may lead to complications such as urinary retention or even kidney damage.
Treatments for BPH include:
- Medications: Alpha-blockers (e.g., tamsulosin) to relax prostate muscles, or 5-alpha-reductase inhibitors (e.g., finasteride) to shrink the gland.
- Minimally invasive procedures: Such as transurethral resection of the prostate (TURP) or laser therapy, used in more severe or non-responsive cases.
3. Urinary Tract Infection (UTI)
UTIs can trigger a temporary spike in PSA levels due to inflammation and irritation of the urinary tract and prostate. This is particularly common in men with predisposing conditions like diabetes or an enlarged prostate.
Typical UTI symptoms include:
- A burning sensation during urination.
- Frequent or urgent need to urinate.
- Cloudy, foul-smelling, or blood-stained urine.
- Lower abdominal, pelvic, or back pain.
- Fever and chills (in more severe infections).
Diagnosis is made via:
- Urinalysis – to detect bacteria or white blood cells.
- Urine culture – to identify the specific bacteria involved.
Treatment typically involves:
- Antibiotics to eliminate the infection.
- Pain relief or anti-inflammatories, where necessary.
- Increased hydration to help flush the urinary system.
Important note: PSA testing should be postponed until several weeks after the infection has resolved to avoid misinterpretation. Infections skew PSA levels significantly and may lead to false positives.
4. Prostatitis (Prostate Inflammation)
Prostatitis is most common in men under 50 and is often due to a bacterial infection. It causes inflammation and irritation of the prostate, and its symptoms often mimic those of UTIs.
Symptoms may include:
- Lower abdominal, back, or pelvic pain.
- Pain or discomfort during urination.
- Urinary frequency and urgency.
- Flu-like symptoms (with bacterial prostatitis).
Treatment depends on the type:
- Acute bacterial prostatitis: Requires antibiotics, bed rest, and anti-inflammatory medications.
- Chronic prostatitis/chronic pelvic pain syndrome: May be treated with alpha-blockers, anti-inflammatories, and pelvic floor physiotherapy.
PSA typically returns to baseline once the inflammation resolves.
5. Prostate Injury or Medical Procedures
Any trauma to the groin, such as from a fall, recent surgical procedures (e.g., prostate biopsy, catheterisation, cystoscopy), or vigorous physical activity, can temporarily raise PSA levels. Even activities like cycling or sexual activity shortly before testing can cause transient spikes.
To ensure accurate PSA results:
- Avoid ejaculation, strenuous exercise, or medical procedures affecting the prostate for at least 48 hours prior to testing.
- Always inform your healthcare provider of any recent physical or medical activities.
6. Parathyroid Hormone (PTH)
Parathyroid hormone regulates calcium and bone metabolism. Some studies link elevated PTH to increased PSA and possible stimulation of prostate cancer cells, though this area remains under investigation and is not yet conclusive.
Elevated PTH may indirectly contribute to high PSA levels. Parathyroid hormone helps regulate calcium levels in the blood. Emerging studies suggest that elevated PTH levels may be associated with an increased risk of prostate cancer and may also stimulate prostate cancer cell growth, even in those without a current diagnosis.
7. PSA and Prostate Cancer
While high PSA levels may indicate prostate cancer, they are not definitive proof. Your doctor may recommend PSA testing along with a digital rectal exam (DRE), and in certain cases, imaging tests or a biopsy.
Doctors typically recommend regular PSA screening for men aged 50 and above, and earlier (starting around 40–45) for men with a family history of prostate cancer or of African descent, who are considered higher-risk groups.
If both PSA and DRE suggest concern, a prostate biopsy, where a small sample of prostate tissue is collected for lab analysis, may be advised. This is considered the gold standard for diagnosis.
Biopsies, however, carry risks such as infection or bleeding. Some cases of prostate cancer are slow-growing and may not require immediate treatment. Your doctor might suggest active surveillance as an option.
Seeking a Second Opinion
Getting a second medical opinion is always a good idea, especially before undergoing invasive procedures like a biopsy. Another doctor can confirm your diagnosis or offer additional treatment options. This may help you make a better-informed decision, ease anxiety, and give you peace of mind.
Tips for consultations:
- Take a companion along to help record and ask relevant questions.
- Prepare a list of concerns ahead of time.
- Request all lab results and medical reports in writing for your records.
Being an active participant in your healthcare decisions leads to better outcomes and reduced anxiety.
Final Remarks
According to the American Cancer Society, men with PSA levels between 4 and 10 ng/mL (often referred to as the “gray zone”) have about a 25% chance of having prostate cancer. If PSA is above 10 ng/mL, the risk increases to over 50%.
But remember, high PSA levels do not always mean cancer. They can result from various benign conditions. Therefore, don’t panic. Let your doctor walk you through follow-up steps. If further testing (like MRI, DRE, or biopsy) is advised, ensure you understand the pros and cons of each.
Key Takeaways:
- PSA is a valuable indicator but not a definitive diagnostic tool.
- Elevated PSA does not always mean prostate cancer.
- Age, infections, prostate enlargement, and even recent ejaculation can all influence PSA readings.
- Always discuss your PSA results with a qualified physician and insist on a comprehensive evaluation.
- If prostate cancer is diagnosed early, it is highly treatable. Non-cancerous causes like BPH and UTIs also have effective treatment options.
- Consider a second opinion before proceeding with invasive tests.
Empower yourself with information. Ask questions. Get tested responsibly. And always seek clarity, not fear, when it comes to your prostate health.