Cancer Screening · Prostate
Prostate Cancer Screening
Prostate cancer is common and often slow-growing. A simple blood test called PSA can help catch it early, but screening also has real trade-offs, so the decision is a personal one we make together.
This page explains what PSA is, who should think about it, and how to weigh the benefits against the downsides.
The Basics
What is prostate cancer screening?
The prostate is a small gland that’s part of the male reproductive system. Screening usually means a blood test for PSA (prostate-specific antigen). A higher PSA can be a sign of cancer, but it can also come from a benign enlarged prostate, infection, or even recent activity like cycling or ejaculation.
Why isn’t it automatic?
Many prostate cancers grow so slowly they would never cause harm in a person’s lifetime. Screening can find these, leading to biopsies and treatments, with side effects, for a cancer that may never have mattered. That’s why the decision to screen is made thoughtfully rather than by default.
Who & When
The U.S. Preventive Services Task Force framing:
- 55 to 69 — an individual choice. Decide together after weighing the potential benefit against the harms; some men value early detection more, others prefer to avoid the downsides.
- 70 and older — routine PSA screening is not recommended.
- Higher risk — it’s reasonable to start the conversation earlier, often around 45 (or even 40), for those with a family history or who are Black, groups with higher risk.
The bottom line: if you’re 55 to 69, talk it through and decide what’s right for you.
Consider starting the conversation earlier if you’re at higher risk.
The PSA Test
PSA is measured with a routine blood draw. There’s no single “normal” number that guarantees safety or means cancer; results are interpreted alongside your age, prostate size, prior values, and trend over time. Because things like an enlarged prostate, infection, or recent ejaculation can raise PSA, an elevated result is often rechecked before any next step.
Benefits & Trade-offs
The potential benefit
For some men, screening finds aggressive cancer early enough to treat it and can lower the chance of dying from prostate cancer.
The potential harms
- False alarms — a raised PSA that isn’t cancer, leading to worry and a biopsy.
- Overdiagnosis — finding a slow cancer that never would have caused problems.
- Overtreatment — surgery or radiation that can cause urinary leakage or erection problems.
When cancer is found, not everything needs immediate treatment. Many low-risk cancers are safely monitored with active surveillance. You can read more about the test on our PSA lab page.
The Digital Rectal Exam
A digital rectal exam, in which a clinician briefly feels the prostate, is sometimes done alongside PSA but isn’t required for screening. PSA is the main tool, and screening can be done with the blood test alone.
Higher Risk
Some men have a higher baseline risk and may choose to start the conversation earlier or weigh screening differently. This includes having a father or brother with prostate cancer, being Black, or carrying an inherited gene change such as BRCA. Let us know your history and we’ll factor it in.
Signs to Watch
Screening is for men without symptoms. Urinary changes are common with age and usually come from a benign enlarged prostate rather than cancer, but tell us about:
- Trouble starting or a weak urinary stream, or going more often at night
- Blood in the urine or semen
- New, persistent bone or back pain
These deserve evaluation on their own, separate from routine screening.
Useful Links
Talk it through with Dr. Mui
Trying to decide whether PSA testing is right for you? Book a visit and we’ll walk through the benefits and trade-offs for your situation.
Prefer to ask first? Text Dr. Mui at 617-675-4085.
This page is for general education and isn’t a substitute for professional medical advice, diagnosis, or treatment. Screening guidelines change over time and the right plan depends on your personal risk. Always talk with a qualified health provider about your specific situation.