Prostate Examination OSCE — DRE Technique, IPSS, and PSA Counselling

Why This Station Is Tested

Digital rectal examination (DRE) of the prostate is a core skill tested in OSCEs at UK medical schools, usually combined with a history-taking or counselling component. It appears in urology, primary care, and oncology contexts. The station tests procedural competence, consent, and interpretation of findings.

IPSS — International Prostate Symptom Score

Before any examination, always take a targeted history using IPSS domains:

Score 0–7 mild, 8–19 moderate, 20–35 severe LUTS. Also ask about haematuria, haematospermia, bone pain, weight loss (red flags for malignancy).

Before the DRE

• Obtain informed consent: explain the procedure, its purpose, the chaperone, and that it may be uncomfortable
• Offer and document a chaperone — mandatory
• Position: left lateral (Sims' position) with knees drawn up, or standing leaning forward onto the couch
• Equipment: gloves, lubricant, light

DRE Technique — Step by Step

1. 1Inspect the perianal area: skin tags, fissures, fistulae, haemorrhoids, excoriation
2. 2Warn the patient before touching: "I'm going to place my finger gently now"
3. 3Insert the index finger slowly — ask the patient to bear down slightly to relax the sphincter
4. 4Assess the anal sphincter tone (note if reduced — may indicate neurological issue)
5. 5Locate the prostate on the anterior wall — feel for the two lateral lobes and the median sulcus

Prostate assessment:

PSA Counselling

Before requesting PSA, counsel the patient:

• PSA is a screening aid, not a diagnostic test — it can be raised for benign reasons (BPH, prostatitis, UTI, recent ejaculation, vigorous exercise, DRE itself)
• A raised PSA does not confirm cancer; a normal PSA does not exclude it
• Consequences of a raised result: further investigation (MRI, biopsy), anxiety, potential overdiagnosis

Completing the Examination

"This concludes the examination. The prostate was [size/consistency/sulcus/tenderness]. To complete my assessment I would request a urine dipstick, MSU, PSA after appropriate counselling, renal function and eGFR, bladder ultrasound for post-void residual, and uroflowmetry."

Frequently Asked Questions

"What is the difference between BPH and prostate cancer on DRE?"

In BPH, the prostate feels smoothly enlarged, symmetrical, with preserved median sulcus and a firm-rubbery consistency — like a tennis ball. In prostate cancer, the gland feels hard and craggy with an irregular, nodular surface; the median sulcus is often lost. Asymmetric enlargement, induration, or a fixed prostate (suggesting extracapsular extension) are all red flag features. However, DRE has poor sensitivity and specificity — approximately 25% of prostate cancers are not palpable on DRE, which is why PSA and MRI are essential components of assessment.

"When must you offer a chaperone in a prostate examination OSCE?"

A chaperone must always be offered before any intimate examination — this includes DRE, pelvic examination, testicular examination, and breast examination. In an OSCE, you must verbally offer the chaperone, state whether one is present, and document the patient's decision. Examiners specifically mark this. A chaperone protects both patient and clinician. If the patient declines, document this clearly and proceed only if the patient still consents to the examination without a chaperone.

"What are the indications for DRE in an OSCE context?"

DRE is indicated in the assessment of lower urinary tract symptoms (LUTS), suspected prostate carcinoma, rectal examination for constipation or rectal bleeding, assessment of anal sphincter tone in neurological examination, and faecal impaction. In an OSCE, the station will typically specify the indication in the vignette — read it carefully as the findings you describe should match the clinical scenario (e.g., hard irregular prostate for a cancer scenario, smooth enlarged prostate for BPH).

"What is the IPSS and why is it asked before examination?"

The International Prostate Symptom Score (IPSS) is a validated 7-item questionnaire assessing lower urinary tract symptoms: incomplete emptying, frequency, intermittency, urgency, weak stream, straining, and nocturia. Each domain is scored 0–5 for a maximum of 35. A score of 0–7 is mild, 8–19 moderate, and 20–35 severe. It is used to quantify symptom burden, guide management (watchful waiting for mild, alpha-blocker or 5-alpha-reductase inhibitor for moderate-severe), and monitor treatment response. In an OSCE, asking about IPSS domains scores marks for systematic history taking.

"What must you counsel a patient about before requesting PSA?"

Before requesting PSA, explain: PSA (prostate-specific antigen) is a protein produced by prostate cells — it is elevated in BPH, prostatitis, UTI, after ejaculation, vigorous exercise, and DRE, as well as in cancer. A normal PSA does not exclude cancer and a raised PSA does not confirm it. Age-adjusted reference ranges apply. If raised, further investigation (MRI, TRUS-guided biopsy) would follow, which carries risks (bleeding, infection, anxiety). Discuss the psychological impact of false positives, the possibility of overdiagnosis, and that treatment of low-grade cancer may not prolong life. The patient must make an informed decision.

"What position is used for DRE and why?"

The two most commonly used positions are left lateral (Sims' position) with knees drawn up towards the chest, and the standing position where the patient leans forward resting their arms on the couch. Left lateral is preferred for most patients as it is more comfortable and provides good access. The standing position may be preferred in some urology settings as it allows better assessment of the posterior prostate. In an OSCE, state your choice and rationale. Whichever position you use, ensure the patient is adequately exposed and maintained with dignity — cover the patient with a sheet until the moment of examination.

Related guides: PR (Rectal) Examination OSCE · Haematuria History OSCE · Urology History OSCE · Urinary Tract Infection OSCE · Consent and Capacity OSCE